A male tramp stamp; located at least 2" under the naval and directly in the path of a growing "Happy Trail".
Mike just got a Happy Stamp and is waiting for the hair to grow back.
by LWeezy July 28, 2013
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When someone has to take shit and it's starting to turtle head, it's also known as stamping happy faces in their underwear.
I have to go take a right shit now... I'm stamping happy faces in my underwear!
by Kacie A. January 12, 2006
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