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1.
A very thin moustache that resembles a pencil line. It is shaved to look this way as very few people have thin enough facial hair to grow one naturally. Sometimes even it can be drawn on.

Might I also add it is very erotic and retro to have one.
John Waters is a person who usually sports a pencil line moustache.
by Toee August 30, 2006

Words related to pencil line moustache

beard facial hair goatee hair moustache