Verb. For one to swing one's scrodum back and forth until a sound is heard. The sound can either be high pitched like a slap, or it can be deep like your ball sack is jelly. While swinging your fellow peers encourage you to trust forward harder, propelling the sack to make an intense clacking noise. The person who makes the louder noise with their ball bag is the champion of NYM&FR.
I thought it could never be done, it was terrible, yesterday I clacked so hard my sac started to bleed profusely. I screamed but luckily my friends were there to massage the pain away.
by M&F Race May 11, 2005
a form of sex in which the male (or a female with complete strap-on genitalia) repeatedly inserts their balls into their partner's asshole. The balls and asshole are each lubricated to ensure full pleasure for both participants.
To stimulate their dormant sex life, the husband surprised his wife during their weekly sex by getting behind her, and clacking her into submission.
by clackmaster3000 November 22, 2011
by ChaDMcBaDD October 12, 2009
When a skier on a ski lift clacks their skis together knocking snow off their skis in the hopes that the snow will fall on people below
by Psycho snowboarder December 25, 2010
by Jim, Chris November 29, 2004
I probably should have been clacking so that I could move out of my apartment before the lease expired instead of doing cleaning a packing at different times.
by Definition Queen87012 December 24, 2015