Particle Sweat

An extremely unpleasant-smelling combination of anal cleft perspiration and the residuals of high-frequency flatulence (usually travel-related). The phenomenon usually occurs when one is confined to a seat for long periods of time (such as on an airline, bus, train, or jury duty).

The majority of cases are clear and colorless, though extreme cases can take on a more opaque hue.

My flight to New Zealand was 13 hours straight. I was soaking in a puddle of particle sweat by the time we touched ground.