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An exclamation or retort used to interrupt someone who is complaining about something trivial. Usually said from one guy to another, with the undertone of "quit whining because your pussy hurts."

Likely (d)evolved from the expression "wah, my pussy hurts" since a hurt pussy cat would mew, mew, mew.

Sometimes used along with QQ or pew pew.
- Wait, I can't find my favorite pair of gloves and I haven't written a note for my roommate and...
- Mew mew mew, yeah whatever, let's go, we're late.
by Sir Yelof February 12, 2010
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