- fuck-brained
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1. mod. stupid; mindless. (Taboo. Usually objectionable.)□ What a stupid, fuck-brained idea!□ I don’t know why I’m stuck in this fuck-brained job.2. mod. obsessed with sex. (Taboo. Usually objectionable.)□ All he thinks about is dames. He is totally fuck-brained.
Dictionary of American slang and colloquial expressions. 2015.