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When your titty fucking a girl, you look back and notice that you have left a racing stripe on her chest and nonchalantly wipe it away with the palm of your hand and continue.

Keep an eye on William, he is known to leave a nasty Coffee Stain.
by Kaka Butt November 14, 2007
The stains left in your underwear after unleashing a wet fart
The bean soup I ate for lunch gave me coffee stains.
by Joe Z January 08, 2007
When you spread an Italian girl's brown pussy lips and the skin forms a circle that looks like a coffee cup stain.
I spread Stephanie's pussy and found her lips looked like a coffee stain.
by charming sorrow January 17, 2009