Top Definition
when a distant cousin, with the same last name, tries to hit on you or tells his friends your hot and he would hit that.
girl1: I met a 3rd cousin, with the same last name, one time for 5 minutes and he just told a mutual friend that I was "hot".
girl 2: Ewww...you know what that is? a cousin creeper- STAY AWAY, you're one step away from kissing cousins!
by squeezyesq August 06, 2010

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