Top Definition
human penis; so called for the in and out action during coitus, supposedly like the breaching and plunging of a dolphin
"Dude. Vera will be swimming with the pants porpoise tonight, bro!"
"Dude! Really?"
"Yup. She's finally giving up that poonanny, dude."
"Right on, dude."
by C.C. Black January 31, 2008
5 Words related to pants porpoise

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