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(v.) To make quiet, phrase used by Italians, and made popular by a 1983 song by Joe Dolce, who had a very bad Italian accent.
"What you say to me? SHADDAP YOU FACE!" *slap*

What's-a matter you, hey, gotta no respect
What-a you t'ink you do, why you look-a so sad
It's-a not so bad, it's-a nice-a place
Ah, shaddap you face*

*candidate for worst song ever.
by Kung-Fu Jesus May 06, 2004
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