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1.
A 'loyal' fan to the now pop group(*miss your 'emo' muzic*)Marianas Trench. They call their fans Trenchers. These people are picking it up.
"Heyy my Trencherss!" BLAH BLAH BLAH


-Mike
by juggalette4ever April 17, 2009
 
2.
The loyal fans of the pop/punk/rock band, Marianas Trench.

A group of 100 Trenchers is called a TrenchFam.
"If I could marry all you Trenchers.. I would" Mike Ayley (bass player in MT).
by MTrencherX October 18, 2012
 
3.
Known as an open (faced) sandwich. Actual name should be trencher as used from medieval times.
Common in Danish cuisine, known as smorrebrod.
Irritant: I'll have an open sandwich.

Irritable: It's "trencher" you idiot. Saying "open sandwich" is like saying "two-wheeled tricycle". I'll "open sandwich" your face with the palm of my hand in a minute.
by mcmonk August 12, 2008