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Cockblock is a slang term for an action, intentional or not, that serves to prevent someone from having sex. Such behavior is often motivated by jealousy, or competitiveness, although it is sometimes accidental, or inadvertent.A cockblock or cockblocker is a person who engages in such obstruction or intervention.uch behavior is often motivated by jealousy, or competitiveness, although it is sometimes accidental, or inadvertent. A cockblock or cockblocker is a person who engages in such obstruction or intervention.
Wiktionary(0.00 / 0 votes)Rate this definition: 1  crowbar(Noun) An iron or steel bar, often with a flattened end which may also be hook-shaped, to be used as a lever to manually force things apart. 2  crowbar(Noun) An electrical circuit that prevents an overvoltage from causing damage.