jerk off

from WordNet (r) 3.0 (2006)

jerk off
    v 1: get sexual gratification through self-stimulation [syn:
         {masturbate}, {wank}, {fuck off}, {she-bop}, {jack off},
         {jerk off}]

from The Collaborative International Dictionary of English v.0.48

jerk off \jerk` off"\, v. i.
   To masturbate. [vulgar slang]

   Syn: whack off.
        [PJC]

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