High metabolism - jgreen brings up a good point about Fatty with him also eating fat food all the time plus the smoking. He really needs to get into a gym and exercise.
I can't imagine being out with a group of friends and one of my close friends drinks himself into convulsions on a semi-regular basis and not doing more to try and help him.
While I understand that concept, it isn't so cut and dry. First, these guys may have a problem themselves. Second, even if they don't, it is difficult to confront a friend when you know it isn't likely to help and will only serve to piss them off.
You're completely right -- it sucks, but if they don't want to quit then good luck stopping them. This thread IMHO seems like a cry for help -- good luck FFB -- you know what you need to do.
Underneath The Bottle Oooohh whee, look at me, looking for some sympathy It's the same old story, of a man and his search for glory And he found it, underneath the bottle Things are never good, things go from bad to weird Hey gimme another Scotch with my beer I'm sad to say, I feel the same today, as I always do Gimme a drink to relax me Oooohh whee, liquor set me free, I can't do no work The shake's inside me Ah shucks, I got the lousiest luck, I'm sick of this Underneath the bottle Seven days make a week, on two of them I sleep I can't remember what the heck I was doing I got bruises on my leg from I can't remember when I fell down some stairs I was lyin' underneath the bottle Oooohh whee, son of a B. You get so down, you can't get any lower So long world, you play too rough And it's getting me all mixed up I lost my pride and it's hiddin' There, underneath the bottle Lou Reed -get some help dude