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1) A large, deaf person who has an irrational fear of giving away his middle name.

2) A "short bus"

3) Frequently says dumb things that are very funny
-Hey Milfag, what's your middle name?
-What's your middle name?
-I can't tell you.
by Master Bus April 30, 2010
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Milfag is an expression of describing airsoft players who go hardcore milsim and scream commands at you, they are normally very fat and out of shape and dont look like they would actually be in the military.
Dude this guys actually being an absolute milfag right now.
via giphy
by Truceacred June 11, 2019
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