Top Definition
A hamburger that is entirely non-existant; used commonly to piss off the cashier working at Mcdonalds.
personA: Welcome to Mcdonalds may i take your order?
personB: Yeah...uhh..I'd like a..uhhh...u got any of those Mcfagburgers?
personB:yeah I'd like a Mcfagburger cuz everything here is gay!
by stphn_kng November 02, 2006
5 Words related to Mcfagburger

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