A definite finishing line in an argument. Usually crosses the line and is a very offensive statement, but results in a decisive and unanimous win for the person who executes it.
Jones and I were arguing for about an hour last night, til I hit him with the killshot and told him I turned his lesbian sister straight with my cock of glory.
"I'll dig your mother up out of the grave and skull fuck her!"
"Damn, killshot!"
A quote from Dragon Ball Abridged, a fan based parody of Dragon Ball broad casted on you tube. Krillin is one of the main characters in Dragon Ball and in this parody, he is hated by every character where the line 'No one cares Krillin!' is a form of hatred in a comedic perspective. This is said to people who is not required to give your attention or someone who has said something exaggerated to another person who has no interest to the subject.
Sally: OMG! I got a big paper cut and it really hurts!!!
Greg: No one cares Krillin!