look up any word, like lemonparty:
When someone non-popular or not even in the picture comments on it. Ending all comments for the picture. Comment-Killers could be: Creepers, weirdos, non-talkative people that just talk on facebook, or old people.
There were 19 comments on that pic until Dale posted the Comment-Killer.
by Dierks Olgensen April 29, 2010