Question: Brass bands were being discussed today which naturally led to someone claiming to be *brassed off* about something, meaning disgruntled or annoyed. Does anyone know the origin of this expression? Michael Quinion over at [World Wide Words](http://www.worldwidewords.org/qa/qa-bra2.htm) suggests the phrase may have arisen from the Royal Navy's use of cleaning brasswork as a punishment, but that doesn't seem altogether convincing.

Answer: 
This NGram suggests **brassed off** came later than **brass monkey**, as used in the expression *cold enough to freeze the balls/nose off a brass monkey*. I know some of the earlier usages for *brass monkey* here don't actually have that figurative meaning, but plenty do.

In light of that, I would simply say that "brassed off" actually *derives* from the earlier expression. If you've been kept hanging about in the cold, that's a typical situation where you'd be "brassed off".

Huge numbers of slang expressions are assigned naval/military origins, and I suppose it's always possible sailors were more in the habit of using that colourful metaphor for *biting cold*, but I doubt it's got anything to do with actual specific things made of brass on ships or similar.

![.](https://i.stack.imgur.com/qSfwh.png)
My understanding of the phrase is that it originated from the practise of sharpening an engineer's twist drill. The sharp cutting edge was dulled. Otherwise the sharp cutting edge would bite into the brass and chatter. If the cutting edge was removed it could cut into brass sheet or solid bar without any trouble. Hence the drill had been brassed off. I cannot see the connection between the usual understanding of the phrase as in hacked off, pissed off etc.