Definitions from Wiktionary (Bonk)

▸ verb:  (informal) To strike or collide with something.
▸ verb:  (informal, chiefly UK, ambitransitive) To have sexual intercourse (with).
▸ verb:  (skateboarding, snowboarding) To hit something with the front of the board, especially in midair.
▸ verb:  (informal, sports) To experience sudden and severe fatigue in an endurance sports event due to glycogen depletion.
▸ noun:  (informal, countable) A bump on the head.
▸ noun:  (informal, countable) Any minor collision or blow.
▸ noun:  (informal, countable, chiefly UK) An act of sexual intercourse.
▸ noun:  (informal, uncountable) A condition of sudden, severe fatigue in an endurance sports event caused by glycogen depletion.
▸ noun:  (countable) An animal call resembling "bonk", such as the call of the pobblebonk.
▸ noun:  A surname.

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