Top Definition
This can be the act of masturbating continuously(several times)until all semen has been ejaculated, or the act of three or more males violently masturbating onto a member of the opposite or same sex.
"I haven't masturbated in a week; time for a jackoff assault"--or--"A couple of us finished her/him off with a jackoff assault".
by darkangel18 May 08, 2015
2 Words related to jackoff assault

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