What does the Spanish word lero lero mean in English?

If you are talking about a Mexican expression. It means:

Ex.

A: I'm not going to the party tonight.

B: Uh lero lero. You are going to miss the fun. Sorry.

A: Make fun of me!

Ex.

A: A bird poops on me!

B: lero lero, haha.

To make fun of someone in a bad and embarrassing situation.

But it's not a serious thing, it's a joke, a friend thing.