Top Definition
A gay male who is the "top" in anal sex.
My boyfriend is a total assgunner, my ass is always sore.
by Tocs "assmuncher" Fenn September 26, 2004

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The tailgunner on a WWII bomber.
Pilot: We have a bogey on our six!
Co-Pilot: Don't worry, the assgunner's got 'em.
by MechaMonkey September 28, 2004

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

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