Top Definition
Pseudo-Latin for "to (the point of) orgasm." Generally used to describe overlong descriptions of sexual activities, whether verbally or in writing. Related to ad naueum.
Sean: ...so then she told me I was getting harder, and then she gave me this look, like, this really fucking sexy look, and then she started kissing me again and she started with the ear lobe and...

Ryan: Dude, I'm glad you got laid, but you don't need to describe it ad orgasium.
by u_dropped_ur_pocket January 05, 2011
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