Cosby Sweater: The sexual act of eating Fruit Loops, Fruity Pebbles, Trix, and Boo Berry- or any other 'bright, colorful' breakfast cereals- and then vomitting the tacky, dazzling mixture onto your partners chest. The result should look similar to the incredible sweaters that Bill Cosby wore during his highly successful 1980's sitcom "The Cosby Show".
Christos was was overjoyed to receive "a Cosby Sweater" for his birthday.
Ref: Urbandictionary.com
WTF?? Now I know I'm getting old. This is a sexual act? If you consider this to be an arousing act, I do not want to know you.