Monster cropping is a technique where clones from a flowering mother plant are taken and then rooted. The clones will revert back to vegetative state and result in a very wide, bushy plant.

For more on monster cropping view theses articles:

• Monster Cropping Marijuana Plants
• Pruning Marijuana Plants
• Pruning Tricks To Increase Your Marijuana Yield
• Advanced growing techniques for a bigger yield

More pruning definitions:

Pruning | Fimming | Topping | Super cropping |SOG (Sea of Green) | SCROG (Screen Of Green) | Low Stress Training | Lollipopping | Overpruning