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In Porn: PMAO stands for "pissing my ass off" or the act of urinating in someone's gaping asshole. -As popularized by the LegalPorno website.
After getting triple penetrated, she got into kitty style position for a vicious PMAO session.
by beautifulrock July 10, 2015
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Contraction between "Pissing me off" and LMAO. It means that you are extremely pissed on someone or something.
Your Boss: "Hey would you please file all these documents to the archives?'
To yourself: Huh... PMAO!
by Pmao January 02, 2015
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pooping my pass off
by not andrew or sergio May 21, 2009
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A mixture of lmao (laughing my arse off) and pmsl (pissing myself)
Dotty laughing with her friend finished with "pmao" in error instead of lmao or pmsl and the new hybrid word was born!!
by EJC81 May 16, 2011
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