A little piece of poo stuck on your butt hole that stays there for a while
or a bug hanging on to your clothes
"oh looks like you've got a hitchiker"
by Mikmelhan September 6, 2005
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when a guy sticks his thumb up a girls ass and gets shit all over it
i dirty hitchiker this girl yesterday and my thumb still smells!
by April482589654 January 1, 2009
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