MD Dick 

(Or WIZZ Dick) Commoly occurs after a big night on MDMA or Meth-Amphetamine. The size of your penis will shrink to a child like state(<5yrs) after excessive consumption of either of the stated stimulants/substances.

"Fuck I can't show her this, I feel like a toddler when I look in the mirror. I got MD Dick bad."

P.S. Don't scuff yourself {Scuff Ya Cunt}

MD Dick by Your Mum Was Great Last Nite October 30, 2004

Mobile Dick Sucking Unit / M.D.S.U 

The Mobile Dick Sucking Unit or 'M.D.S.U' for short is a contraption devised to enable players to get head while walking along, thus enabling them to continue day to day life, while pimping it up.
It's basically a tray on wheels.

Guy 1: 'Did you see that badman walking along and getting sucked off by that slammin' hottie at the same time?'

Guy 2: 'Yeah mate, that's Kessah using his Mobile Dick Sucking Unit / M.D.S.U'

Mobile Dick Sucking Unit / M.D.S.U by idealismfosho January 4, 2010