Top Definition
When large amounts of pubic hair are left on the rim of a toilet seat.
The always present rimstash in Alfi's bathroom is the result of him keeping it clean for the ladies.

As drunk as I am, I'm still not using that stall with the grizzly looking rimstash.

She's hot, but why oh why do you call her Rimstash? Dude, when she goes to the bathroom, she always leaves a stash of pubs on the toilet seat.
by weaver9million November 18, 2010
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