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When something bad happens to someone you dislike, this word is used as sarcastic sympathy. It is correctly pronounced 'Paish'.
"I feel so sick"
"Oh pash. That's too bad"
by september_rain August 01, 2006
To pash: is to "offend" or "diss" or hurt someone in any way. It is a funny word to be used at all times in replacement for other words.
such as "We just pashed that boy"
or "nah man you just got pashed"
or "pashedy pash pash"
by Nina and Phoebe November 05, 2005