a thin stream of seamen put somewhere on a girl's(most likely a skank's) body by someone she has had a sexual encounter with.
That skank let me leave a jizz train in her hair!
Choo Choo! hey ladies, wanna hop on my jizz train tonight?
Choo Choo! hey ladies, wanna hop on my jizz train tonight?
by Philip McAvoy May 4, 2008
Person 1: OMG, did you see the sparks from that train?
Person 2: Yeah, that was some serious train jizz
Person 2: Yeah, that was some serious train jizz
by that girl you know April 11, 2009