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An exclamation that indicates that one believes the previous speaker's statement is ridiculous or is untrue. Generally used to sarcastically snap or mock at the speaker.

Synonyms include yeah right, my foot and Abba Cha
Guy 1: Man, that pretty girl there was ogling at me.
Guy 2: Pettindayya!

Friend 1: The latest Balakrishna movie was too good.
Friend 2: Pettindayya!
by Reginald Jeeves November 07, 2010
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