the act of sex also known as "FUCKING" to the point of orgasm usually concisting of several positions , and or one or more breaks to smoke and the go again until the point of exhaustion
hey maya did u "knick knack" with justin yet?
maya: no no i didnt take my pill yet but as soon as i do i bet the knick knack will be amazing .
by JustinMayaLu January 28, 2009
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the thing you wear under your pants/skirt, not to be confused with "panties" which is a retarded american word that we have no use for. See also: underwear
Gotta get some new knick knacks, my old ones have mysteriously disappeared
by Immi_callmepnk August 26, 2007
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Knick the Ridge:

When one is shaving around their brown eye and catches the razor on one of their butthole ridges.
Knick The Ridge: a small cut on one of the butthole wrinkles

Man, my girl was shavin’ her black cherry and accidentally knicked a ridge. No playin in the fudge factory tonight boys.
by LeroyLooselips March 27, 2020
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Genitalia, and the various other (sometimes considered decorative) bits on the human form.
Wife: Show me the ol' knick knacks.

Husband: BRB, imma dust off.
by Eloraborealis January 22, 2023
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An unattractive person used for one time only non-comittal sexual relationships...
Steve pulled his friend Larry aside at the bar, pointing excitedly for Larry to look. "Hey brah see that real dog on the other side of the bar with that pimply face and that junky butt? Why don't you be a gentleman and knick knack paddy whack give a dog a bone?"
by LondonBridgeisFuckingDown November 23, 2009
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