when you wear pants that "slurp" to your leg and "cup" your ankle. They are tight on your leg and flare out at your ankle. Different from flare legged jeans. Bascially jeans that don't fit you right.
Nicole: My pants slurpped and cupped!
Jessica: What did you say? A slurpie in a cup???
Nicole: No my pants slurpped and cupped!
Jessica: Oh lol. What is that?!
Did you see that girl? She was wearing slurp and cup pants!!!