ReeferNow.com -- Reefer Now
There is one live trademark for Reefer's ("herbs for smoking") and one dead trademark for Reefers (clothing)
However, Reefer is a generic word, and Reefer Now is a brandable phrase, a possible name for a Marijuana/weed shop -- where it's legal, of course.
Given that Marijuana is still illegal in most states, consult with an attorney or expert for advice on how this term may be used in commerce.
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