1 definition by Cosmic Ralph

Swamp Log

When you insert your penis into a girls (or guys) asshole, and leave it inserted for an extended period of time (10-15 minutes for example), until your penis collects a film of feces, creating the effect of a swampy log.

Dude... Jake just gave Scotts girlfriend the swamp log, his dick is sooo nasty.

by Cosmic Ralph June 24, 2009