i have to say mephedrone by far, i say this because a 200mg capsule of it i had in my wallet broke and got all up in my wallet, this was 2 months ago and my wallet still STINNNNKS of that shit, enough that i can some times smell it from my pocket.
Dried mushies, the funny thing is, after all of the lunch periods at my school have been served, the entire cafeteria smells overwhelmingly like how mushies taste. its disgusting everyday though, let alone once in a while.
Cat-piss smelling not very pure Mephedrone makes me nauseous when I think about it... By far worse for me than dried mushrooms, Robitussin and all of them put together
Most disgusting one I've smelt so far is ghb, but I know there's far more disgusting nsmellug drugs than that out there. My friend thought it would be funny to wipe it on my face when he spilt it on his hand..