Are you looking for body stink, in which case pinch you butt cheeks together while taking a dump, and then don’t wipe, or better yet, forget to pull down your shorts.
If you looking for a nice manly gaseous stink, the kind you can take real pride in, my most toxic combination is beer and chocolate, add in some spicy food and some greasy food(sausage) and you have yourself a stink you can be proud of, just don’t forget the beer, the cheaper the better.
If you want, I’ll look up my mother’s recipe for saurkraut mushroom soup. It’s a traditional Slovak Christmas dish, and it’s absolutely yummy.
Combine it with pierogies and lots of cabbage. You’ll probably end up suffocating on your own waste gases.
Definately gas, sorry to be unclear. I want to be able to turn it off and on.
Plus, if it’s not too much to ask, the more solid I can keep my bowels the better. In fact, I’m willing to sacrifice the stink level a bit if I can comfortably let 'er rip without fear of getting more than I asked for.
You need the aid of organ meats for particularly offensive anal exhaust. I’m thinking for starters, a tin of smoked oysters. The main course: Sandwich of a thick shmear of braunsweiger, a slice of raw onion & lots of spicy brown mustard. On the side, some pickled hard boiled eggs and perhaps a bowl of lightly steamed cabbage or sauerkraut. All washed down with a dark ale, not the cheap stuff. A cheap beer will result in thunderous gasseous emissions, yes, but enable you to shit through a screen door (not the goal, I’d assume). Better go with the dark stuff. Possum Trot Ale is recommended for high power and rankness. Hope you can get your hands on some.
Please note: I am a chick, and have NEVER eaten the above combination of foodstuffs, nor do I consume most of what I listed. However, I am often in the company of stinky men who do. Trust me, it will work.
I find that eating lots of popcorn always give me terrible gas. Not necessarily stinky, but copious. Maybe that combined with one of the above “smelly” suggestions.
Seconding LiveOnAPlane’s durian thing. I don’t think you need much else.
Of COURSE not! No one here would ever have thought anything else! 
Thanks for the vote of confidence, EmeraldGrue, although I now see that we were off base vis-a-vis “stink = gaseous emissions.”
Still…I have to wonder if one were to eat durians, followed by shrimp scampi w/extra garlic, followed by chili dogs with sauerkraut and a whole lot of beer…