Not that it's okay to stereotype or judge, but aren't there just certain guys that when you look into their eyes you just say to yourself, "Yeah, that dude smokes weed"?

You mean like this? 
Okay, I can't help myself...
No wonder his teammates love having him in the locker room...he always laughs at their jokes. Over and over again (forgets the punchline).
No wonder he can't get motivated for the gym and was/is overweight...munchies.
No wonder he sometimes seems apathetic, but other times looks like an all-time great.
No wonder he's one of the best "passing" big men...(since Walton?)
He gets fired up after games, too.
Gotta stop...