I was miffed by how curt my boyfriend was to my best friend.

Asia looks miffed, did something happen?
by PuttingItSimply August 23, 2017
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To be slightly annoyed, specifically with someone or something.
Jane is a bit miffed with Sally.
by Katie October 8, 2003
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a MIF is a MILF without the L.
In other words, a mom that I fucked.
charlie: Damn look at Michele's mom she is such a MILF!
Me: Nah, she's a MIF on my list.
by osco50 March 14, 2008
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Similar to MILF "Mum I'd Like To Fuck", however MIF stands for "Mum I Fucked".
Harry: Kenny your Mum's a MILF

Kenny: Oi!

Ryan: Kenny your Mum's a MIF

Kenny: ....

Ryan: ;)
by Dyaaar December 12, 2009
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You fucked up, typically causing damage of property. Generally resulting in ridicule from close friends.
My sister totaled her car, she miffed it.
by sotsirh February 1, 2016
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See that blonde over there? She's my mif!
by RhodesNYC May 18, 2009
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A member of the venue staff asks if anyone is there for "RammSTEEN" at which point a fan corrects him with "RammSTEIN" and the guy becomes miffed.
by Colter October 31, 2003
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