The process of removing the top growing point of a plant.
"Pinching out" is the process of removing the top growing point of a plant. This is done by literally pinching the bud between finger and thumb.
This is performed to encourage the plant to bush out more, and not to grow vertically up. It also encourages many plants to produce more flowers.
Use this tag for questions about pinching-out - should a plant be pinched out, when to do it, which buds to pinch out, etc.