A weak comeback that is said after just about everything. Most people who use it have no life because they can't think of any thing better to say so they simply use "ohh burn"
A term used when you don't really know an answer...or are too lazy to come up with an answer...and its usually followed with a violent "jerking off" hand motion!
Susie: "What are you doing?!"
Bob: "Ohh you know! (HANDMOTION!)"