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1.
(N) A neologism of "spill-your-sauce" and it is only called spauce when you whack off or have sex in someone else's house without their permission.

It is an insult to spauce in someone's house and not pay them money.
"DUDE! It's $10 to spauce in our house! Cash only!"
by Mamma Murder May 12, 2010