A human being who copulates frequently and is a carrier of one or more Sexual Transmitted Diseases.
Girl 1: OMG, my vag is so itchy after having sex with Cam
Girl 2: Told you he was a Mail Snail.
by Him Almighty June 16, 2011
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After having long vigerous sex with a girl from behind one's testicals at most times become coated with the womans juices, the man then pushes the girl flat onto the bed then drags his balls from her ass to the back of her neck leaving a slimy trail.
after pounding eustice's vag from behind now after several hours, larry realiseing that his nuts are drenched in her snatch slime he forced eustice flat on the bed and gave her a good ol " mail Snail Trail "
by Saulsmin March 16, 2008
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