What is Choo-choo?
1.
1) The sound of train's horn.
2) A child's name for a railway train.
The train started to move and said:
-Choo-choo!
-Mummy, what is it? Is it choo-choo?
-Yes, baby, it's a train.
See
2.
A boneless, furless, amorphus cat.
CHOO-CHOO is evil
3.
a homosexual three way involving either three gay men or three lesbians; as opposed to sandwich action wich involved either 2 men and 1 woman or 2 women and 1 men
Gina, Maria, and Sofia let me watch them do a choo-choo!