1. 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 whole body. The result should look similar to the incredible sweaters that Bill Cosby wore during his highly successful 1980's sitcom "The Cosby Show".
2. A college girl wearing a dress that looks like the above mentioned definition.
Abby wore a Cosby Dress to the party.