A mistress. Generally used by Americans of Southern Italian descent. Thought to be derived from the from proper Italian noun "cumadre".
As long as you take care of the house and the kids and are around most of the time, a good italian wife doesn't mind if you get a gumada.

My pop told me long ago, the cardinal rule to fucking around is this: NEVER fall in love with your gumada.
by succulentboi March 18, 2004
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