BONK Meaning of BONK in English ( N. Amer. also boink ) informal■ verb1》 hit so as to cause a reverberating sound. 2》 have sex. ■ noun1》 a reverberating sound. 2》 an act of sexual intercourse.Origin1930s: imitative. Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004