Brain Train

To Brain Train someone is to "school" them, or "shut them down" with a direct factual comment, sometimes with the help of sarcasm, (but not always) that renders them speechless.

Dude 1 Says: I think my rotor's need replaced because everytime i start my car it squeals.
Dude 2 Says: (with sarcasm) Yeah...Because that wouldn't be your belts needing replaced.
Dude 3 Says: He just totally Brain Trained you!

by *V3R!T@S* April 19, 2010

train brain

The act of receiving head while riding on a train.

I got some train brain on the railroads.

by yins April 17, 2008

Train Brain

Similar to road head, train brain is getting a blowjob on an extremely crowded train.

Carl: Dude, I got the sickest train brain yesterday.
Chad: Nice, what happened?
Carl: I ended up cumming on the guy standing next to me and getting kicked off the train.
Chad: Gnarly.

by Thefuckersattheendofthetable May 6, 2015

Train Brain

A person with mild to severe obsessions with trains.

Can be used to describe general forgetfulness due to the distracting nature of locomotives.

"Collin where is the cresent wrench?". Must have forgotten it due to the Train Brain.

by Timothy Laybiel October 9, 2025

BRAINTRAIN

THE ACT OF PENILE INSERTION THROUGH ONES NASAL CAVITY.

YO, ME AND MY HOMIES DONE RAN DA BRAINTRAIN ON DAT BITCH

by JACKRAT September 26, 2008

’tain yer brain

Do something intellectually fun. (Short for “entertain your brain.”)

You need to ’tain yer brain, bro.

by SawHat66 February 28, 2023