There's A Bat In Da Cave Edit Meaning

1.

It is what you tell someone near a group of people that a booger in their nose is visible without letting anyone else know.

When we were talking in line, I noticed that Louis had a big ass booger in his nose, so I said to him as I slightly pointed at my nose, "There's a bat in da cave". Then he secretly picked his nose with a napkin.

See snot, booger, nose