Chef
Played by Isaac Hayes.
Chef
Chef, as his nickname implies, was a school cafeteria cook at the South Park Elementary School. He was usually the only adult that the main characters on the show (Stan Marsh, Kyle Broflovski, Eric Cartman and Kenny McCormick) consistently asked for advice. A typical introduction went as such:

Chef: Hello there, children!
Kids (in unison): Hey Chef.
Chef: How's it going?
One or all of kids: Bad.
Chef: Why bad?


One of the children then explained to him their problem. Chef used the word "children" often, even for the singular (for example, he referred to Eric Cartman as "children" in "Cartman's Mom Is a Dirty Slut," Stan Marsh as "children" in "Kenny Dies," and Butters Stotch as "children" in "Simpsons Already Did It"). He also tended to use "fudge" as a euphemism, particularly in early episodes.

While most of the inhabitants of South Park are white, Chef was one of the very few residents in town who was black; in fact the only other black people to consistently live in South Park are Token and his parents, who are not prominent characters until the fourth season. As a result, Chef (usually goodnaturedly, though not always) referred to most people in town with the racial slur "crackas," including the children.

Aside from cooking, Chef was passionate about singing - he wrote the song "Stinky Britches" which was later covered by Alanis Morissette - and "making sweet love down by the fire". He was based on such 1970s African-American singers as Isaac Hayes (who voiced him) and Barry White. Often, he agreed to give the boys advice in the form of songs, but winded up singing about having sex. Over time, however, like many earlier characters on the show, his role diminished, and in later seasons he did not sing much even when he did appear.

Despite his preoccupations with women and sex, Chef was generally one of the few level-headed adults in South Park. In addition to dispensing advice to "the children", Chef spoke out against outrageous ideas, and helped save South Park/the world in general from several disasters. However, Chef was not above performing nonsensical acts, such as buying a fancy TV that he couldn't even program (and that eventually turned into a combat robot).

In earlier seasons, Chef was often approached by the children when they were unfamiliar with a sexual term or practice. This happened so often that it got on Chef's nerves, several times he would say things like "Goddammit, children, why do I always have to be the one to teach you these things?", but go on to explain to them whatever they wanted to know anyway.

Chef’s last name suggests he could be at least partially of some Celtic descent, and indeed his parents live in Edinburgh, Scotland.

In the episode "Chef Goes Nanners" he briefly converted to Islam and adopted the name Abdul Mohammed Jabar Rauf Kareem Ali.

In the episode "The Return of Chef" he died after joining the Super Adventure Club, but was later resurrected in that same episode as Darth Chef. He has not (to date) re-appeared after that episode.
Source: Wikipedia

Regular

South Park

002
Cartman Gets an Anal Probe
003
Volcano
004
Weight Gain 4000
005
Big Gay Al's Big Gay Boat Ride
006
An Elephant Makes Love to a Pig
007
Death
008
Pink Eye
009
Starvin' Marvin
010
Mr. Hankey, the Christmas Poo
011
Damien
012
Tom's Rhinoplasty
013
Mecha-Streisand
014
Cartman's Mom is a Dirty Slut (I)
015
Terrance & Phillip in 'Not Without My Anus'
016
Cartman's Mom is Still a Dirty Slut (II)
017
Ike's Wee Wee
018
Chickenlover
019
Conjoined Fetus Lady
020
The Mexican Staring Frog of Southern Sri Lanka
021
City on the Edge of Forever
022
Summer Sucks
023
Chef's Salty Chocolate Balls
024
Chickenpox
025
Roger Ebert Should Lay Off the Fatty Foods
026
Clubhouses
027
Cow Days
028
Chef Aid
029
Spooky Fish
030
Merry Christmas Charlie Manson!
031
Gnomes
032
Prehistoric Ice Man
033
Rainforest Schmainforest
034
Spontaneous Combustion
035
The Succubus
036
Jakovasaurs
037
Tweek vs. Craig
038
Sexual Harassment Panda
039
Cat Orgy (I)
040
Two Guys Naked in a Hot Tub (II)
041
Jewbilee (III)
042
Korn's Groovy Pirate Ghost Mystery
043
Chinpokomon
044
Hooked on Monkey Phonics
045
Starvin' Marvin in Space!
046
The Red Badge of Gayness
047
Mr. Hankey's Christmas Classics
048
Are You There God? Itís Me, Jesus
049
Worldwide Recorder Concert
050
The Tooth Fairy's TATS 2000
051
Cartman's Silly Hate Crime 2000
052
Timmy! 2000
053
Quintuplets 2000
054
Cartman Joins NAMBLA
055
Cherokee Hair Tampons
056
Chef Goes Nanners
057
Something You Can Do With Your Finger
058
Do the Handicapped Go to Hell? (I)
059
Probably (II)
060
4th Grade
061
Trapper Keeper
062
Helen Keller! The Musical
063
Pip
064
Fat Camp
065
The Wacky Molestation Adventure
066
A Very Crappy Christmas
067
It Hits the Fan
068
Cripple Fight
069
The Super Best Friends
070
Scott Tenorman Must Die
071
Terrance and Phillip: Behind the Blow
072
Cartmanland
073
Proper Condom Use
074
Towelie
075
Osama Bin Laden Has Farty Pants
076
How to Eat With Your Butt
077
The Entity
078
Here Comes the Neighborhood
079
Kenny Dies
080
Butters' Very Own Episode
081
Jared Has Aides
082
Asspen
083
Freak Strike
084
Fun With Veal
085
The Terrance & Phillip Movie Trailer
086
Professor Chaos
087
Simpsons Already Did It
088
Red Hot Catholic Love
089
Free Hat
090
Bebe's Boobs Destroy Society
091
Child Abduction is Not Funny
092
A Ladder to Heaven
093
The Return of the Fellowship of the Ring to the Two Towers
094
The Death Camp of Tolerance
095
The Biggest Douche in the Universe
096
My Future Self n' Me
097
Red Sleigh Down
098
Cancelled
099
Krazy Kripples
100
Toilet Paper
101
I'm A Little Bit Country
102
Fat Butt and Pancake Head
103
Lil' Crime Stoppers
104
Red Man's Greed
105
South Park is Gay!
106
Christian Rock Hard
107
Grey Dawn
108
Casa Bonita
109
All About the Mormons?
110
Butt Out
111
Raisins
112
It's Christmas in Canada
113
Good Times With Weapons
114
Up the Down Steroid
115
The Passion of the Jew
116
You Got F***ed in the Ass
117
AWESOM-O
118
The Jeffersons
119
Goobacks
120
Douche and Turd
121
Something Wall-Mart This Way Comes
122
Pre-School
123
Quest for Ratings
124
Stupid Spoiled Whore Video Playset
125
Cartman's Incredible Gift
126
Woodland Critter Christmas
127
Mr. Garrison's Fancy New Vagina
128
Die Hippie, Die
129
Wing
130
Best Friends Forever
131
The Losing Edge
132
The Death of Eric Cartman
133
Erection Day
134
Two Days Before the Day After Tomorrow
135
Marjorine
136
Follow That Egg
137
Ginger Kids
138
Trapped in the Closet
139
Free Willzyx
140
Bloody Mary
141
The Return of Chef!
171
Jay Leno Comes to South Park
177
South Park: Bigger Longer & Uncut