You knew him. Hell, maybe you were him. Holy hell, maybe you still are him. Regardless, this is about as identifiable a meme watch as you're going to find. If at some point in your life a super stoner didn't reside you really haven't lived. When there's a consistently really high person in your life your eyes are opened to all new semi-coherent way of thinking. You discover weird and delicious meal combinations. You watch nature shows you'd never watch otherwise. You waste weeks of your life listening to recorded live concerts that are "superior to studio recordings." Your worst, laziest decisions are 100% enabled.
On a separate note, based on no evidence whatsoever, I'm almost positive @Qwikster is the dude in this photo. He's totally ordered super salad.