When your exhaust (insert any other car mod or apply to anything that your significant other finds annoying and makes you get rid of as a result) is too loud for your wife and she demands that you remove that thing or else...
Kontebonker is an insult and it literally means "assbanger" in Dutch. Kont means ass or butt and bonker means banger. The word kontebonker is mostly used to say that a person is gay.