a pinch
Pinching is when you rip off the top of a weed plant with your fingers like a grumpy old man who hates life and smells like old socks. It makes the plant grow more buds so you can smoke more and forget your problems.
I pinched my plant so hard it cried pot tears.
My bud grew like a fat kid on candy after I pinched it.
Pinching my plants is my version of therapy.