Head stash (aka headstash) is cannabis culture slang for your personal, private stash of cannabis, as opposed to the weed you share. As a cannabis dealer, your headstash might consist of high-grade cannabis than what you sold. As a cannabis consumer, a headstash might be a reserve of extra high-quality cannabis you don’t want a roommate or partner to consume without you. A head stash is the stash for your head, as opposed to others.
Headstash has become a cannabis industry term for high-quality, ‘reserve’ cannabis products. In some states, headstash might be the name of a brand.
‘This Pink Certz is going right into my headstash. I’m going to try and make it last. No crazy party blunts.’