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2.
Bad tempered mood,
"He wouldn't talk to me as he had a right cob on" or
"She had such a cob on that she wouldn't even put the kettle on"
by Elizza June 10, 2006
 
1.
Verb: (I think)

Origin: Northern England

Term used to describe the state of being usually referred to as grumpiness or sulking. Aka 'being in an arse', 'having a mard' or just basically being a miserable, pissed off so and so.
Peter: "What's wrong with that stupid bitch?"

Paul: "F*** knows, she's got a cob on"
by Glenn Parington June 26, 2005