A noise, usually used on Instant Messanger or e-mail when in doubt, upsetted, or angered. A sign of being unpleased.
Person 1 : I didn't get you a Christmas present.
Person 2 : Why not?
Person 1 : Because I don't like you anymore.
Person 2 : -crosses arms- Hmpfh.
by Meghead egg explosion July 18, 2009
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