Shake it three times

To turn yourself on while your urinating - (for males).

Going for a slash
Make sure you "shake it three times" dude.

by Monkey666 January 23, 2011

If you shake it more than three times you’re playing with it

An expression used before or after one takes a piss, meaning that if it takes more than three shakes to get rid of the excess pee it can be considered masturbation.

Tom: Man, I sure have to take a piss

Larry: Well be quick about it, if you shake it more than three times you’re playing with it!

by Cornyhotdogs November 7, 2017