Mikal Smith -- son of ex-NFL head coach Lovie Smith -- was arrested in Arizona this week after officials say he's been pimping, TMZ Sports has learned.
The 43-year-old -- who served as an assistant coach under his father with the Chicago Bears and Tampa Bay Bucs -- was booked on Thursday for a slew of disturbing charges.
Officials tell TMZ Sports ... Smith is facing everything from pandering (another word for pimping) along with receiving earnings from a prostitute and sex trafficking.
He's also facing charges of money laundering and conspiracy.