Top Definition
When your fucking a girl from behind, just as your about to cum you raise your arms in triumph and let out a terrifying shreik mimicking the prehistoric winged animal...the Pteradactyl.
Last night when I was nailing my girl, just before I came I pteradactyled her and was like "AARAAAGHHH"!
by Martin Leggett October 29, 2007
1 more definition
When your star is giving two hand jobs with arms out and sucking dick. The motion looks like a pterdactyl.

Submitted by The Wrong Demographic.
Three of us came home from the bar and Marty's girlfriend got naked and turned into a pteradactyl.
by the wrong demographic March 27, 2014

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