from The American Heritage® Dictionary of the English Language, 4th Edition
- n. Chiefly British Slang A person regarded as mean or contemptible.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. One who engages in nonsensical chatter or unwanted conversation.
- n. A person of very poor judgment and unpleasant character.
Perhaps ultimately from obsolete gobshite, wad of expectorated chewing tobacco or tobacco juice : gob2 + dialectal shite, excrement (from Middle English shiten, to defecate, from Old English *scītan).(American Heritage® Dictionary of the English Language, Fourth Edition)
gob + shite (i.e. mouth + excrement) (Wiktionary)