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2.
An anus that has been trained to fart as soon as a wife and or girlfriend has left the room.
A fart snuck out of Tyler's trainus as soon as Bailey left the room.
by Jiggles6 February 01, 2011

Words related to trainus

anus fart farting train us tranus
 
1.
An anus that looks big enough to navigate a train through. An anus that resembles a tunnel going into a mountain.
I was going to fuck the bitch but as I tried I accidentally fell in her trainus and had to be extracted by the jaws of life.
by Phil M June 16, 2004