dry-jacking 

the performance of masturbation why not being able to ejaculate.

Boy 1- Dude, I was jacking off last night and i still couldn't cum.
Boy 2- Oh, so for short you were dry-jacking

dry-jacking by CREEPINxDEATH June 22, 2010

dry jackin 

masturbating with your clothes on/no lube

The meeting was so long, I wanted to fuck something, so I dry jackin right there under the table.

dry jackin by ddffaa February 11, 2006