touching one's genitals. can be used in various circumstances, e.g. sacktapper, sackmacker, sackslapper, et cetera. often used to insult one or to denote someone as a good friend.
didn't you, you sackTAPPER?
by Ryan September 22, 2003

Rhyming slang for wanker
by ryan March 24, 2004

when your penis is under your balls
by ryan April 29, 2004

by Ryan April 13, 2004

by ryan April 18, 2005

by Ryan February 08, 2004

by ryan December 07, 2003
