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The phenomenon that men are instantly more attractive when they are wearing formal attire, especially suits. (Based on the character Barney Stinson from the sitcom 'How I Met Your Mother')
Girl 1: Man, that guy is deeeelicious
Girl 2: It's just the Barney Stinson effect!

Girl 1: Is that Tom? Man, he looks waaaay hotter than usual
Girl 2: Duh, he's wearing a suit. It's the Barney Stinson effect
by RandomHipsterChick April 05, 2014
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