JP's Nymphing Mud aka MojoMud- Anglers Accessories MojoMud has changed its name to JP’s Nymphing Mud. It is a pliable tungsten putty perfect for technical nymphing. You can add or subtract even the tiniest amounts to really dial in your weight. Put it at a knot so it doesnt slide down your leader. No more nicks from split shot. Flatten it out and roll it on. Brown.