when you are making a joke not funny anymore like when everyone is laughing and having a good time and someone out of nowhere just gets naked, they say kills.
OH KILLS.
man: hey hows it going
dude: fine how are you?
man:nice weather today is it?
dude: ummmm i like the ground
man: OH Kills!
Kills Me can be used in describing a thing, person, object or anything basically. It means that a thing has a trait that causes an emotionally reaction in the person viewing the thing.
Variations are;
Kill me
Killed me
The well known novel, The Catcher in the Rye (J.D. Salinger) features the character Holden Caulfield who frequently uses the phrase when reacting to phonies.
used in threads, like on facebook or myspace, to show that someone has just asked a question which has been asked a million times before and to which the answer is obvious.
Greg: Hey, what's up with the whole puppy killing thing?