Meaning weak rubbish and used predominantly by emos and the sci-fi computer gaming community in response to statement or question you disagree with to imply the same. Entered the lexcon via my space/faceparty and similar social e-networking sites.
example 1 - Conversation on an internet forum relating to anime characters from the Final Fantasy 7 plysation game.

- Sepiroth's cute
- pfsssh look at Seph he looks like a demented clown without make-up

- But you're blond, all the guys like you
- pfsssh being blonde doesn't mean anything!!! i was actually thinking of going back again..=\
by Samantha Welch May 18, 2007
Get the pfsssh mug.