Top Definition
Ancient Gaelic word meaning Knight

Also used to refer to one badass individual.
That Cavin is the shit, isn't he?
by Cavmaniac June 18, 2008
1 more definition
An anal fissure, created by the forcible removal a large object from a rectum.
Derrick asked his lover, to be careful and not pull the dong out too fast, as it would create a Cavin.
by raven root November 25, 2014

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