Fuck someone's brains out - Wiktionary - Fuck my brain out
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Definition of fuck my brains out in the Idioms Dictionary. fuck my brains out phrase. What does fuck my brains out expression mean? Definitions by the largest. To fuck for a long period of time.. Quickly. As in thrusting fast for hours. To make both man and woman climax multiple times in an hour. To make a head imprint.