To masturbate, usually done by a male, in a public place. In commmemoration of a guy I knew who got caught whacking off in the bathroom. Enough Said.
Hells yeah! Joshin' it up is freakin' awesome!
by Jeremy April 18, 2005
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Is the art form of going to your brother-in-laws house when you're suppose to help work but instead play double U casino,sleep,watch netflix, and josh it up.
Hey do you think josh is still joshin it up?
by joshin it up June 29, 2016
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