Top Definition
Short for: shut the fuck up dumb ass. Used on internet sites where people get annoying, or even when talking to a friend about someone you don't agree on. (religion for example)
Internet Example:
Person1: I am better than all of you because i was hte second person to join
Person2:stfuda

Friend:
Friend1: The big bang never happened.
Friend2: stfuda it did
by imeow November 15, 2009

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