1. A commonly attempted dance move where the dancer shakes their butt so fast that the resultant jiggle can attract even hetorosexual members of the same sex.
2. A sex move performed in the 'doggy' position. The male stands motionless on his knees while the female oscillates her butt so fast he is brought to a climax by no action of his own.
1. We knew Brittney's dance had reached the Tri-B-D level once even the girls on the dance floor where checkin' out that ass.