Okay this has nothing to do with lycra +humidity+B.O. (unless you have a baaaaaaad medical condition). What's the most gag inflecting, nostril invading, nausea sustaining smell you've ever come across?
Rotting whale carcass. Years ago while on Cape Cod with the USCG, we were called in to tow a dead humpback out of the shipping channel. Oh yeah, it was bad. We had to stay there breathing it in for an hour while the biologists were getting their measurements. At least this time we didn't have to get in the water to attach the tow line.