Eminem is an emcee who doesn't do too many fancy hand gestures. While his lyrics are complex (see the multies lesson), his hand motions are simple. He holds it down with some basic moves, often rapping with one arm extended far in front of him. He varies it up by throwing his arm in the air, dropping it to his side, swinging it back and forth or doing other moves, but his basic move keeps his arm far out in front.
To do it, extend your arm in front of you so that your elbow is bent just slightly. Your hand can be pointing or with your fingers all flat. Now you have two basic moves. One is a vertical chop, up and down on the beat. The other is to twist your hand in front of your chest and either do something close to the Ninja Star or just throw it back out again quickly.
Because the motions are so dramatic and exaggerated, this one’s good for big jams or battles. I like going from this one into a full arm version of the Mos Def Wave and then back.
Eminem performing "Mockingbird," using a laid-back version of his chop, plus the Mos Def wave.