To fully or partially cut off someone's penis with a dull butter knife to get things going. Doing what it takes to light a fire under some dumb cunt's ass. Often used as a pedagogical aid on the job.
"Private Pyle, I WILL motivate you, if I have to short dick every cannibal in the Congo."
-- R. Lee Ermey
Full Metal Jacket
a dick that is very small, and is common to belong to an asian person
Wang is 2in... he has a short dick