What is Killing It?
1.
performing at the highest level; ripping;
That guy surfing the blue board on the south side this morning was killing it...
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2.
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.
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3.
To ruin or mess up by doing something annoying. ("killing a high")
Stop f*ckin around man! You're killin' it!
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