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a sketchy, creepy, suspicious looking person. Usually a man.
Girl 1: That guy has been following us around the whole time
Girl 2: what a fuckin trenchie!! lets get out of here.
trenchie by valeuchick June 13, 2008
Related Words
Trenchie - Noun - An individual that is a fan or a groupie of the Canadian band Marianas Trench.
I'm a Trenchie for life!

Look over there, they are wearing Marianas Trench gear, they're a total Trenchie!
Trenchie by JeniferHxC July 6, 2010
A very cool person who has an excellent style sense and wears a trench coat. If you are a trenchie you should be very proud as it is the greatest compliment and being a trenchie means you are the coolest person ever.
'There's a trenchie.'
'Oh wow, I wish I was a trenchie'
Trenchie by Trenchie moose March 5, 2022