Australian euphamism for a herb mill used to grind choof (marijuana). Also known as a Muller, its purpose is to increase the surface area of the material, so that smoking or eating it will bring out more THC.

Made from metal and/or plastic, choof choppers come in many shapes and sizes. Some have a box attatchment to catch the material. The main problem with choof choppers is that they can get clogged easily if wet tobacco or choof is put into them.
Hey, mate, don't chuck ciggies in the choof chopper - premium bud ONLY!
by Googles October 30, 2004
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