sack whacking

Beating one's dick for pleasure, sometimes while fondling the sack.

"Zane, the neighbors can hear you sack whacking- tone it down!"

by Jordan Mealick January 24, 2014

Sack Wacking

When you take your sock off, put soap in it and run around outside at midnight in the mud swinging at each others dicks.

Boy: Im going sack wacking.
Boy 2: You better not sack wack me!

by TheBopMaster August 19, 2016