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The prepubescent facial hair (sub-nasal) of one originating from the greater Belfast area. Usually a sportswear enthusiast (i.e "Kappa leek")
"I say! Is that young fellows upper lip dirty?"
"No you ballbag, it's a Belfast tash leek your ma's last night - Yeeeeooooow Up the UTP!!"
by Sen John Stone August 03, 2006
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