bonk
[bongk]
–verb (used with object), verb (used without object) Slang .
to hit, strike, collide, etc.: to get bonked on the head; cars bonking into each other.



I like squirt better than bonk. Squirt is a sexual term... Bonk is about hitting. x0pa is right - the sexual term is boink, not bonk.

boink
[boingk]
–verb (used with object), verb (used without object) Vulgar Slang .
to have sexual intercourse (with).

But honestly, it's been decades since I've heard anyone use the term boink.