Elmo

The route of all evil. Comes off sweet, cuddly, and lovable, but give him the opportunity and he will eat your babies and molest you in your sleep.

kid 1: My sister got real quiet after we got my baby brother that elmo doll...
kid 2: Dude... where IS your baby brother?

cow

1. A word that can stand for "Crazy Old Woman."

2. A word to describe a person with a fat ass.

3. A large animal that can be made into beef.

As such, it's a double-whammy as an insult.

1. "My granda has kind of turned into a cow..."

2. Get out of my way, you stupid cow!

3. The cow said "moo."