Slap who?

Sitting at the snack table, one child got really excited about what we were having. He bursted out,

"Its so goooooood, I'm gonna slap yo mamma!"

I couldn't help but laugh. When I asked him where he had heard that, instead of telling me, he started repeating it a billion times until I had to tell him to stop. It didn't end there. All the children began saying it throughout the day and the rest of the week. We almost had to ban the saying, because it was getting so annoying.