bonk Syllabification: (bonk)Pronunciation: /bäNGk/ informalTranslate bonk | into Italian Definition of bonk verb 1 [with object] knock or hit (something) so as to cause a reverberating sound:he bonked his head on the plane’s low bulkhead 2 [with object] have sexual intercourse with (someone). 3 [no object] (of a cyclist or runner) reach a point of exhaustion that makes one unable to go further:I bonked and couldn’t pedal another stroke noun 1an act of knocking or hitting something that causes a reverberating sound:give it a bonk with a hammer 2an act of sexual intercourse. 3 (the bonk) a level of exhaustion that makes a cyclist or runner unable to go further:we had the bonk when we were saddle soreOrigin: 1930s: imitativebonk in other Oxford dictionaries Definition of bonk in the British & World English dictionary