Monkey

A word used When ones train of thought is lost or one stops him self from saying something vulgar. It can be and often is replaced with one of three other animals.
These are
1. Cow
2. Chickens <= yes it must be plural
3. Turtles

Bill: So last night stacy and i were about to get it on and...
Bob: No way she is so hot!
(long silence)
Bob: So...You were saying...
Bill: Um...MONKEY

Dude your mom is Such a Bit...Monkey