2.) A dance made popular by the Puerto Ricans, also know as Perreo, which is Spanish for "doggystyle dancing." It is the act of simulating sticking your stick into a swamp donkey. Bitches love it.
Willie busted out The Grind at the Mother-Son dance last night on Feester's mom, the kid is a legend.
2. Any and all activities which seek to accomplish and/or lead to the acquisition of sex, most of which are done without regard to anything else but the end result.
"The Grind Don't Stop, it Can't Stop, it Won't Stop!!"