When one person (girl or guy) uses their teeth to shave/pull pubic hair out of the other person's vaginal/penis area. Can be done by both Homosexuals and Heterosexuals.
Alex: OMG My Girlfriend was Weed Wacking Me Over the Weekend Jim: Wasn't it Painful?
Alex: Surprisingly No.
Action that is requested by one's marital partner, or close friend, to carry out; this action is revolting because it involves the visual exposure, and handling, of one's extremely hairy bodily parts; this action is usually performed to relieve one's self of heat exhaustion from having a tremendous amount of hair.
In order to be able to fit into his tuxedo, libraty had invited his wife to a morning of weed wacking his back.
Crushing a blunt with a giant ass hammer. Then taking a credit card and forming the weed into a giant super blunt. Then lighting it up and taking a hit through a straw.
Hey dude I got myself a blunt today, let's do some Weed Wacking!