1. sneaky way of telling someone he's a dick sucker
2. a person that can RLY duck sick.. like you can't aim at his head cuz he ducks so sick...
1. "Peter's a sick ducker!"
2. "woot woot look at his gawdly movement..OMFG I can't hit that sick ducker"
Guy 1: (whispering) hey is she a dick sucker?
Guy 2: dude, we're in church.
Guy 1: (whispers) sorry, is she a sick ducker.