Guys- To rapidly yank your crank.
Chicks- To use variouse toys and satisfy yourself, or an electric toothbrush.

to wank off

Last night, I lay my head upon my pillow,
But stayed up late, to masturbate.
Last night, I lay myself upon my bed, but
I stayed awake, for pleasure's sake.
You should see me working on the short strokes,
It's really grand, I use my hand;
You should see me working on the long strokes,
It's really neat, I use my feet.
Smash it! Bash it! Pound it on the floor!
Smite it! Bite it! Ram it through the door!
Oh, it's so neat to beat your meat while sitting on the toilet seat,

What you probably just got done doing

One of the sexiest things that a man can possibly do.

1) SYNONYMS: chokin' the chicken, spanking the monkey, flogging the dolphin, beating off, jackin' off, buffing the banana, wanking off, playing with yourself, tootin' your horn, fighting the purple helmet warrior, rubbing the one-eyed snake, commiting spermicide, taking your turn at the self-serve station, fishing with your zipper trout, beating the shit out of your midget friend, makin' mayo, polishing the family jewels, test-firing the old meat missle, wrapping the hand around the penis and moving it in a thrusting movement. (v.) The act of sexually pleasing yourself to orgasm. For males this involves using the hands to massage the penis in a thrusting motion, while for females this involves rubbing and stimulation of the vaginal and clittoral areas. This is often accompanied by some sort of sexually pleasing visual and/or mental stimulation.

2) (n.) Something a true Catholic cannot do because the wrath of the imaginary friend will come down upon them. See wordgod/word.

to play with yourself

something every girl had done at some point