Roll the dice

Slang term that means masturbation. When u fake roll dice with your hand it looks like a jerking motion.

Man I'm about to roll the dice haha I'm so horny.

Where's jimmy? He went to go roll the dice in the closet

Yank the ball and chain

To masturbate, the ball refers to the male testicles and chain refers to the actual penis

Man I'm so horny, time to yank the ball and chain

I'm so sore, I spent all day yanking the ball and chain

A Tenth period

To masturbate. Means to do it after school. But has evolved into a general term to wank it.
Is tenth period because the typical school day is 9 periods.

Bruh I got to crank out a tenth period. I'm so horny.

I can't wait til the last period, ninth period, ends. So I can wank my dick in tenth period.