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The mysterios and legendary floating device found in a can of Guiness. The expression was formed during a Swedish holiday called "Valborgsmassoafton" by a couple of drunk Swedes.
Pronounced: "flybeetroeep"
"Oh my god, that fluebbetropp is really starting to annoy me."
"Get that fluebbetropp out of my face!"
"Don't chew on the fluebbetropp!"
"mmmm.... fluebbetropp"
by Ulf Textorius May 02, 2005
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