From Homestar Runner Wiki
Many characters in the Homestar Runner universe seem to be fans of Bill Cosby's work, especially the shows The Cosby Show and Fat Albert and the Cosby Kids.
- Second Games Menu — The description of Homestar Talker, "Homestar says the darndest things", is a play on the name of Kids Say the Darnedest Things, a show originally co-hosted by Art Linkletter and later revived with Bill Cosby hosting.
- Pumpkin Carve-nival — The Cheat dresses as Russell, one of the characters from Fat Albert and the Cosby Kids.
- Email mile (DVD commentary) — Mike says his PBTC Bubs impression is pretty much his Fat Albert impression.
- Email car (DVD commentary) — There is a discussion of NBC's Thursday night sitcom lineup including The Cosby Show.
- Halloween Potion-ma-jig — Coach Z dresses as Theo Huxtable from The Cosby Show. The shirt Coach Z is wearing is from the first-season episode "A Shirt Story", in which Denise tries to hand-make Theo a designer shirt and butchers it in the process. Malcolm Jamal-Warner played the role of this character.
- Email alternate universe — The pronunciation "ohbee kaybee" for "okay" was frequently said by the character Mushmouth on Fat Albert and the Cosby Kids. It also made an appearance during a bit about Novocaine and the dentist's office in Bill Cosby: Himself.
- Weclome Back — The city of "Thuxtable" is a reference to Theo Huxtable, a character on The Cosby Show.
- Quote of the Week — In the quote for May 17, 2007, which expands upon a quote from Homestarloween Party, Marzipan notes that she found a worm in her garden and named it "Fat Albert".
- Email yes, wrestling — Homestar Runner thinks Strong Bad's costume is Rudy, from Fat Albert.
- Email winter pool — Homestar Runner is surprised that a swimming pool full of gelatin isn't naturally attracting oiled-up Bill Cosby. This is also reference to the fact that he was a spokesman for the Jell-O brand.
- Dangeresque 3: The Criminal Projective — After the "out and spit takes" in which Strong Bad accidentally pronounces "priceless" as "pwiceless", he tells an offscreen Homestar, "This is your fault, Mushmouth!"