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general::
Phrase(s): off on someone or something
in a rage about someone or something; on a tirade about someone or something. • Are you off on Sally again? Why can’t you leave her alone?, Phrase(s): *off (on something)
1. incorrect in one’s planning or prediction. (*Typically: be ~; get ~.) • I was off on my estimates a little bit. • I guess I was off too much. 2. to have started on something, such as a task or a journey. (*Typically: be ~; get ~.) • What time should we be off on our trip? • We should be off by dawn. • I’m off on my diet again. 3. Sl. to get high on some kind of drug. • Max likes to get off on marijuana.
McGrawhill's American Idioms And Phrasal Verbs