a train that does not need tracks in order to move from point a to point b. usually very dangerous and can strike without warning. in some severe cases, the all terrain train may find where you live and try to get you.
"dude where's phill today?"

"he's stuck at home with 3 all terrain trains circling his house... all he can do is wait."

"oh... ok?'
by asilb5877 October 25, 2010
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When you smoke hookah and use a mixture of soap and water to make a smoke bubble, and the bubble is able to hit the ground and travel over all kinds of obstacles on the ground such as blankets, pillows, and shoes.
Oh shit Sam! Did you see that sick ATB (all terrain bubble) shred your shoe up?
by BRIAN1581456401 April 29, 2010
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Brat, Truck car seat back fun mobile

it go vroom vroom

Subaru
"What is that car sound"

"a car fuckin dumbass"

"no its a truck"

"ACTUALLY, ITS A Bi-Drive Recreational All-Terrain Transporter"

*they all get run over, dont stand on roads*

Brat; "vroom vroom brap brap sounds"
by WillSnek March 19, 2021
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