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An insult to someone who is a fat slag, or who has just done something worthy of such an insult. The incorporation of "Mc" produces a Scottish connotation to the term, while bingo-wings refers to the flabs of fat residing below the arms of over-weight, middle-aged women, who can generally be found playing bingo. In its full form, Slutty McBingo-Wings can also be used as a term of endearment.
1. "Woah! Slutty McBingo-Wings at 9 o'clock!"

2. "Hey, where's Jean?"
"Jean who?"
"You know, Slutty McBingo-wings."
"Oh, she's in the pub."
by Eddie2008 May 13, 2008
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