have a cob on


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have a cob on

To be angry, agitated, or irritated. Primarily heard in UK. John always has a cob on after getting stuck in traffic on his way to work. I don't know why you have a cob on—I was only trying to be helpful!
See also: cob, have, on

have (or get) a cob on

be annoyed or in a bad mood. British informal
See also: cob, have, on