Top Definition
to insert your finger into your anus, then wipe the shit off onto an unsuspecting person's top lip. kinf of like the dirty sanchez.
when steve passed out last night, justin gave him a wicked Shitler mustache!
by tony February 24, 2004
The stripe/s (often resembling the shape of Adolf Hitler's mustache) left on the back of the toilet seat by an inconsiderate defecator
Phil left another shitler mustache on our toilet seat. I don't know whether he's a Nazi or just a regular asshole that doesn't bother to clean up after himself.
by bravestsirrobin June 11, 2015
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