Top Definition
A word used to more effectively tell others to be quiet. This word is most often used when that one friend will not stop talking, or when one just needs peace and quiet. Optimal results are when you scream this word in the midst of a quiet conversation.
Friend: ...And then after we went to the mall we went to the pizza store, which in spanish is called a pizzaria, and while we were there-

You: SHADDAFUQUP
by Joninja January 21, 2013

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