A really lame comeback for when people can't think of anything else. Used mostly by high school kids or adults trying to be cool with the "younger crowd". Usually followed by "OHHHHHHHH" and/or "BURRRRRRRRRRN". Gets really annoying really really fast.
Kid: You just won't play dodgeball against us 'cause you know you'll LOSE!
Teacher: Hey...hey...YOUR MOM!
Class: OHHHHHHHHHHH!!! BURN!!! *laughs like idiots*