Top definition
A hairline that makes your forehead look square as fuck.

A shit ass hairline
Look, hes got a squareline!
by SuperHotTamales December 27, 2017
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2
(Sc-Way-er Line) When a hairline isnt completely straight and goes down before the sideburns start; A hairline that is square or rectangular
"Dude, he has a massive squareline!"
by SuperHotTamales April 21, 2018
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