There are so many slang terms for weed I couldn't possible list them all. Loud is a new one to me as I mostly hear the common ones like Dank, Kill, Fire, Chronic, Kush (not the strain but an adjective for good weed) Purps etc etc. remember that drug dealers are first and foremost salesmen and will always be throwing around fresh pitches with catchy keywords and will often make a sale before you even see the product. a dealer will hype up his product even if he knows its subpar because he know there are no refunds so your opinion doesn't matter to him much unless he is a small timer catering to a specific circle of friends. I stopped going to dealers quite a few years ago thanks to dispensaries.