Definitions
from the GNU version of the Collaborative International Dictionary of English.
- transitive verb vulgar To anger or strongly annoy.
 - intransitive verb Brit., vulgar To leave immediately; to scram; -- chiefly British, and sometimes considered vulgar.
 
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- verb idiomatic, transitive, vulgar, colloquial  To 
annoy ,anger  - interjection UK, Canada, idiomatic, vulgar, colloquial  
go away ! 
Etymologies
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Examples
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johnmperry commented on the word piss off
(1) Go away!
(2) (vt) to annoy
July 22, 2008
			
		
	
chained_bear commented on the word piss off
Usage here.
June 19, 2009