dirty engine

A vagina that has been smashed frequently.

Darren's girlfriend Kate has a dirty engine.

by Jay Barfoot October 20, 2003

Dirty Steam Engine

When you kneel over your ol' lady while she lays flat on her back throating your pecker and you drop your "coal" (bowel movement) on her chest proceeding to yell Choo choo.

Last night the Ole lady asked for a dirty steam engine

by Itainteasybeingcheesy September 16, 2021