I Be Swimming - A stupid excuse made by a dumb person to explain why they're

A stupid excuse made by a dumb person to explain why they're still in the baby seat.

My little bro said, 'I be swimming in this car, I'm not ready yet.'

My cousin said, 'I be swimming in this life, I can't drive.'

My neighbor said, 'I be swimming in this question, I'm not answering.'