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A man who attempts to force his unwelcome attentions on a woman.
A woman is approached and touched by a man in an inappropriate way. She could respond by hitting him with her purse and yelling "Masher!"
by MC April 15, 2004
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2
A man who makes unwelcome sexual advances to women.

From the late 19th century: probably a derivative of slang mash ‘attract sexually’, ‘infatuation’, perhaps from Romany masherava ‘allure’.
The old man in the pub was a real masher.
by karientoch March 16, 2019
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3
A person (usually a man) who gains sexual gratification by inappropriately rubbing against strangers in crowed public places.
It was crowded, but it wasn't that crowded. The guy didn't need to rub his package against my ass as he "squeezed by" - what a masher!
by Rachel Harvieux May 02, 2006
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4
A woman, lesbian or not, who cross dresses as a man.
An old fashioned British term made popular in the music halls in the late 1800’s
There’s a couple of mashers on stage
by squishedpeaches August 20, 2006
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5
A man who feigns serious interest in a woman but is really only interested in a sexual escapade. A player
Be careful. He's a masher.
by B Barron July 02, 2006
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6
A man who rubs his genitals against female commuters on packed trains and/or buses.
Ew. I was sat next to a masher on my way to work today.
by NoOneReally December 04, 2013
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