Top definition
"Can I have a piece of your burrito?"
"Knock yourself out."
by adhesives May 26, 2003
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Soft and offensive. Just like you.

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2
Same as "go for it" or "go nuts".

If you really dont care at all about a person doing/taking something you say "knock yourself out" as in to do/eat until you pass out (if you really want to).

Same as "go for it" or "go nuts".
Person 1: "Hey man, can I have some beer?"
Person 2: "Yeah, Knock yourself out"
by Berd May 29, 2005
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It does not matter how you do it. It's a Fecal Mustache.

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3
A term for: Do whatever the hell you want, it doesn't bother me.
"dad, can i go to the park?"
"Can you get there yourself?"
"Yeah"
"well then, knock yourself out."
by donnald duck June 04, 2005
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He's warmer than you think.

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4
to incapacitate or render oneself unconscious by means of physical, or mental, abuse or deprivation to one's own body.
"You are ridiculous. Knock yourself out now!"
"There is no way I can win this race. I might as well knock myself out!"
"I was about to kick that guy's ass for the way he was talking to my girlfriend, but he knocked himself out already."
by Fat Boy Canada October 08, 2009
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The vengeful act of crapping on a lover's chest while they sleep.

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5
to work hard to achieve something, usually implying success
Wow, Mary! This is a great party. You really knocked yourself out.

It seems every time you give a party you really knock yourself out.
by Oneota June 11, 2008
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Cleveland Steamer Plush

The vengeful act of crapping on a lover's chest while they sleep.

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