A person who barges into a chain of comments and pretends they were apart of the whole conversation. This person usually adds something completely irrelevant or annoying.
Jane: Hey you want to see a movie friday?
Jill: Sure, what movie?
Jane: I dont know. How about District 9?
Jill: Sure. I heard it was good.
Douche: District 9 sucks. GI Joe was better.
Jane: Go away Douche. You comment crasher.
by Studwalker August 21, 2009
Get the Comment Crasher mug.