1. An asshole of a boss 2. an incredibly attractive female
1. On Starship Troopers the dumb blond guy yelled "WHATTA NUT BUSTER!" and got his ass kicked by this angry black woman who comes flying out of nowhere
2. My manager at Best Buy is total nut buster. In both forms of the word.
An improvised grenade made of a shotgun shell inserted into a length of tubing (cardboard, plastic, or thin aluminum) with fins attached to the other end, and a marble or ball bearing taped over the primer. The nut buster is thrown into the air and lands on the marble, firing the shell and spraying the area with shot.
During the riot, two men threwnut busters into the crowd