There's no easy way of saying this - read some Star Wars Euphemisms for Masturbation.

Shooting Womprats in Beggar's Canyon
Grooming the Wookie
Making the Kessel run
Polishing Vader's Helmet
Evacuating Tatooine
Unleashing the Meatsaber
Releasing the Special Edition
Jumping to Delight Speed
Communicating to Red Leader One
Lightsaber practice with Captain Solo
Tinkering with the R2 Unit
Manually targeting the Rebel Base
Performing the Jedi Hand Trick
Scratching Yoda behind the ears

And finally...

Test firing the Death Star