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1 definition by A-ron123

 
1.
M.P.U. is an acronym for Mounted Practice Unit. This unit contains a dildo with a shoulder mount that surounds the head. The M.P.U. has a motor that moves the dildo back and forth. The point of this device is to practice oral sex with a guy.
I suck at giving head, I need to go home and practice with my M.P.U.
by A-ron123 October 31, 2006