To ruin or mess up by doing something annoying. ("killing a high")
Stop f*ckin around man! You're killin' it!
作者 Nancy 2004年12月08日
performing at the highest level; ripping;
That guy surfing the blue board on the south side this morning was killing it...
作者 johnny utah 2005年2月15日
always looking fresh, somebody who is doing well.
Nick Spanos is killing it

swag fresh
作者 nikoff888 2012年10月12日
The act of 'killing it' would be performed after a joke is being told when everyone has just got done laughing and 'the killer

tries to be funny and adds on to the joke in attempts of making it funnier. This of course is not funny, and in turn, 'the killer' was just a big buzzkill, otherwise known as 'killing it'
Person 1: Dude, Blake thinks he's so funny but no one ever laughs at him...

Person 2: Seriously, he tries to make everyone laugh, but all he's doing is killing it.
作者 OprahhWinfreyyy 2010年6月05日
To put an unnecessary end to a good conversation by making a stupid comment.
Will, you killed it!

Sorry Will, but you can't make any comment without killing it. Even if you try to start the conversation, you kill nothing.
作者 Adam Fadida 2008年1月10日

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