word to describe a person who 'snaps' back at you

[sg]

What word would be best used for a person who snaps back answers in a defensive way when you ask them something, rather than simply answer the question. I keep thinking Reactionary is appropriate, but I know that reactionary means something different in a person.

[boxtops]

stroppy

[sandyRoe]

a two word phrase, defensively reactive?

[Mojo-Jo-Jo]

scared.

[237SJ]

Retaliatory

[boxtops]

Irritable

[woofgang]

Reactive is how you would describe a dog who did it so I guess it's good for people too....retaliative is another word but a bit of a mouthful....maybe defensive? Over sensitive?

[douglas9401]

nippy sweetie

[Joanne130]

Rude

[Canary42]

Prickly

[sandyRoe]

pugnacious

[ummmm]

Contrary

[gness]

My Mum.

[ELVIS68]

Guilty

[joko]

bristley
quick tempered
argumentative

[Mick-Talbot]

Lol

[sg]

Brilliant answers all, I think the best is Retaliatory. I am having to soon offer some feedback to a colleague who has been a peer until recently but has just taken on a position above me. They are aware of their habit and we have discussed it before, but as friends/equals. I'll politely offer the opinion that Retaliatory responses are still unacceptable, despite their recent elevation in status, and even especially because of said elevation.

[David H]

Aggressive/attitude problem/misery- I can think of a few here from time to time actually, did that inspire you at all?

[owdhamer]

Brave but daft.