It eats .....

A teacher asks the class to name things that end with 'tor' that eat things.

The first little boy says, "Alligator."

"Very good, that's a big word."
...
The second boy says, "Predator."

"Yes, that's another big word. Well done."

Little Johnny says, "Vibrator."

After nearly falling off her chair, the teacher says, "That is a big word,

Johnny, but it doesn't eat anything."

"Well, says little Johnny, my sister has one and she says it eats batteries like there's no tomorrow" !!