To be model trains for someone means to be happy about their situation. It is the opposite of being jealous or envious. If someone does better than you in a competition or such, you could feel jealous of their result, to instead be happy for them regardles of your own result would be to be model trains for them.
Wow, your house is so nice, I am model trains for you.
I wish I could travel too, but I'm model trains about your upcoming trip.
A term for male masturbation
Bob love Training John while going on xvideos
An act of sex which often incurs two large breasted Asian women punching each testicle as one does with a speedbag in boxing
Bob: Hey Jim! I heard the Chinese Bullet Train you had last night was a wild time
Jim: Yeah for sure
When you take a bong rip you can't finish, leave some stale smoke in the chimney, and clear the bong by blowing into the downstem.
After taking a massive bong rip I couldn't finish, I had to "Thomas the Train" it.
This mission is quite easy if you are attentive
CJ: *loses those mfs*
Big smoke: All you had to do is follow the damn train, CJ
The train you and a few mates get on when you're going for a messy journey through space and time. Also known as the K Hole train.
Jake: I wanna go on the messy train
Ross: Yeah, Lets make some lines
2 fat lines are made and snorted.
Jake: Beaut
Ross: Yeahhhh