Explaining "laid off" to Boo

Boo: Mommy, why are you in play clothes?

Mom: I don't go to work anymore so I don't have to dress up. (Or change out of my pj's.)

Boo: Why? You don't like [Company Name] anymore?

Mom: No, I do. I like it a lot, but [Former Boss] doesn't like me. I'm not allowed to go over there and play anymore.

Boo: I don't like [Former Boss]. She's not nice.

Never let it be said that children are too young to understand. I put it in pre-K terms and she nailed it.