Orignally used to describe railbuffs, it now describes anyone who gets excited about something so much that they start foaming at the mouth.
Those geeks that play magic the gathering are foamers. They get so excited over one card that they start foaming at the mouth.
by Brent Higgins February 27, 2006
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Somebody who is obsessed with trains, may or may not work for the railroad. But they love trains so much they foam up in the mouth staring at trains, and jerk off with the foam.
Foamers: oh, you work for the railroad? I would have but didn’t send in a application, but I know everything about trains. I have a 64 track full model train set up through my house, I even sit on my lawn chair and stair at trains going by.

Normal railroad worker: wtf?
by Imnotthat_gaaaayyy June 8, 2018
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A person who is extremely obsessed with trains, usually they don't stop talking about it.
Person 1: Henry is such a foamer! He talks about trains all the time!
Person 2: I know right!
by fc2078 October 28, 2020
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Used by professionals in the theme-park industry to describe hard-core fans of theme parks, amusement parks, and attractions.

As a fan base, they get so excited about something that they start foaming at the mouth.
Those foamers over at the MousePlanet discussion boards are freaking out about the latest Epcot rumors.
by eticket October 12, 2010
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When a male's penis is not erect, but completely down either. Usually occurs in between the two. (See also: Chubby)
<Girl> Wow! Peter has a huge cock!
<Guy> Nah, it's just a foamer.
by p-viddy April 21, 2004
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When an individual inserts any number of mentos between 3 and 10 up the rectum and proceeds to buttchug an entire liter of Coca Cola or other carbonated beverage.
Damn that was hot my girlfriend Stella just sent me a video of her doing a Matthew Foamer
by Doctor Bitch Pants November 28, 2021
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