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1.
The tanline that men have; tan calves and knees, but extremely pale thighs to the point of hilarity.
Jon's tighty whiteys really showed of his manline.
by shelovessomeone August 30, 2007
 
2.
tan lines on a man.
After being in the sun all day, I took off my sandals and noticed I had man lines on my feet.
by brandipeaches August 11, 2011