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1.
Something that makes you mad. From the word miff. Like "maddening" but that's not a word either. Or disappointing.
Also a form of the verb of 'miff'.
The lack of Killers' concerts in Northern Canada is absolutely miffing!

She kept miffing me off by trying to steal my copy of Hot Fuss!

I was in quite a miffing situation when the people were taking pictures of me and Brandon!
by Andrea June 07, 2005