Alright, so look. I'm a fat guy. As in 5x shirt, 62 waist. I find it hard to find clothing for myself that's not a t-shirt or jeans, and I'm really trying hard to -not- wear so many blatantly casual, thrown-together things. Are there any recommendations for what I should look for or try out in terms of clothing that straddles the border between casual and formal that would look good on a man with a very wide waist? Because most men's fashion, from what I've seen, doesn't translate well when its like you've got tires round your body.

Any advice would be much appreciated.

Well the best advice is to lose some weight. If you're that big it's not healthy, irregardless of any fashion issues.

Having said that, probably the best advice would be to try to get some regular trousers rather than wearing jeans. I'm not sure, but I think that for larger people if you dont get flat-fronted trousers, get ones with pleats (that kinda fold thing) at the waist. I remember hearing that that was good for somebody with quite a large waist, because then it doesnt look quite so much like the fabric is being stretched by the persons size. I've not looked into this myself so you probably want to try on a fwe different pairs.

Also, try a pair of "proper" shoes e.g. not sneakers. They don't have to be ultra-formal (like what you'd wear with a suit) but some well looked after leather shoes make a good impression. I'm not sure whether to suggest trying to find button-up shirts to go with the trousers or stick to t shirts.

If you can't find clothes that fit perfectly the way you want, you could try getting ones that are almost how you want them and then taking them to a tailor to have them adjusted (e.g. sleeves might be too baggy while the shoulders actually fit perfectly etc etc)

big & tall.

me i shop at small & short.