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1.
In mid masturbation approaching orgasm, if a male is frightened by a loud noise or such and ejaculates with no orgasm, that is a fearjaculation.
FEARJACULATION: Verb

Oh man dudebroman, I was nailin this chick last night and I thought I heard my girlfriends car door shut, and I was so scared I fearjaculated.
by Mainmeno December 12, 2010