from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Chiefly British Easily offended or annoyed; ill-tempered or belligerent.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Ornery, fractious, belligerent, or obstreperous, and hence difficult to deal with.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- adj. obstreperous
Perhaps alteration of obstreperous.(American Heritage® Dictionary of the English Language, Fourth Edition)
From obstropulous, obsolete slang for obstreperous. (Wiktionary)