Conrad Murray Crime and Bunishment

12/19/2014 7:50 AM PST

Conrad Murray -- Crime and Bunishment

Conrad Murray's locked up and loving it -- he's grown his hair out so long that he's gone next level ... the man bun.

Michael Jackson's doc enjoyed a lunch date Thursday in Miami with his gf Nicole Alvarez. 

It might beat a ponytail -- but still ... you'd have to be heavily sedated to rock that 'do in public.