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Email abbreviation for "You've got to be fucking kidding me". Often used by Navy types as a show of incredulity.
What? SuppO's serving beef yakisoba again? YGTBFKM!
by King Neptune February 26, 2006
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You've Got To Be Fucking Kidding Me, typically uttered in response to anything that is so totally stupid as to be unbelievable.

Note: often pronounced more rapidly as "YiGiTBiFKiM"
Seriously, Congress? You're going to reach an interim deal on the fiscal cliff for now, and then resolve it more permanently in a couple months? YGTBFKM!
by DaddyG January 10, 2013
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