Crystal zooties (plural), or a crystal zooty (singular), are spliffs rolled using marijuana crystals as apposed to grinding up buds.

Sometimes as a result of not picking up soon enough and running out of bud.
"You know what?" he said,
"What" his mate replied,
"It's crystal zooty time beiiii" he shouted excitedly whilst launching himself towards the weed paraphernalia.
by Quantmebad December 4, 2018
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