A short shimme followed by a gentle moan, performed by a female after a particularly intense lip engagement. Females will not perform a "steam train" at the beginning of their menstrual cycle

Internet persona(s) who happens to follow you and you happen to follow them back and maintain communication with and have a mutual liking for eachother whether it be friendship wise, etc. (Mutuals if more than one mutual)

The best kind of trains ever.

move side to side with a sigh after a girl is turned on, usually by a kiss

What you have to board when you've bought too many games, and now you gotta to play them all.

While having a girl under the blankets, giving you your pleasure, get her all sweaty and steamy...before ejaculating yell out "TOO TOO" then push her head down and fart in her mouth and continue to ejaculating like a steam train blows smoke!!!

What girls do after a good pull. A small shake and moan.