A cutesie-poo version of caterpiller, mainly used by "baby talkers" and deranged teens.
You're my catermapiller!
Heh-heh, look at that catampiller!
Used by drunks and ANGRY people to cause havoc on fellow dim-wits.
Go suck a catermapiller!
No, you're the catermapiller!
You are such a catermapiller!