a slang term for masturbation.
I got really horny so I caved in.
by sean & nina July 11, 2005
Top Definition
Means "old news."

Originated on Lambgoat.com
Complaining about hardcore attire is cave in.
by Fraulein July 13, 2004
a horrible time, an upset, a dissapointment.


man that was bunk, never doing that again.

no man that was a cave in, it's usually better than that.
by giinocto June 04, 2008
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