Etymology

brainfuck

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Today it means: Something that destabilizes, confuses, or manipulates a person's mind. Full definition →

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brainfuck · noun, proper noun, verb1

From brain + fuck (“to play with; to tinker”).

Brainfuck · proper noun2

From brain + fuck, implying that it is confusing to use.

Etymology from Wiktionary, CC BY-SA 4.0.