Abbreviation for penis-in-anus sex, that is, sexual intercourse via the anus (anal sex).
Conner told his boyfriend he'd rather do PIA than settle for head.

Yesterday Marcus had condomless PIA sex with his wife.
by Tyler123446 December 1, 2021
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Pain In Ass.
That lady is a real PIA
by Jen-na-na February 19, 2010
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so perfect, loving, individual, precious, cute, what else could i want? oh yeah and mexican
and then the pia flew down from above to save me
by The One March 8, 2005
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A reference made to a male who looks like a fag or queer. Determined by something odd that stands out in a negative way. Say for example, the way they dress/look, walk or talk, very skinny and weak looking, or even something they say.
Usually said as a quick phrase such as, "Oh piasss."
by default01 April 7, 2009
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Penis in Ass. The sexual act of sliding a penis into another persons ass.
After enjoying missionary, we made this spicy with some PIA.
by Al-BadDaddy February 10, 2020
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