n. Person who is penetrated by their partner, taking on a submissive role in the sexual relationship (see pitcher
Can apply to various types of sex, especially anal, and is usually used to describe homosexual males. Doesn't apply to vaginal sex, though it can be used to describe heterosexual couples that make use of strap-ons.
Person 1: "Matias is a total catcher"
Person 2: "Yeah, I heard he loves it up the ass"
n. Used to describe someone who is retarded, moronic, stupid, inept, etc.
Derived from the disorder Trisomy 21, which is the cause for down syndrome. A handy phrase to use in public when you want to call something retarded, but the non-politically correct nature of the word doesn't allow you to do so.
Person 1: "Did you hear that Robbie failed all of his classes?"
Person 2: "Wow, what a fucking 321"
Person 1: "Such a 321... after I told him I failed one, he was like 'That's NOTHING, I failed ALL of mine.'"