A piping hot dump that you take in the middle of the summer (sometimes extending out into Indian summer) while in an outdoor public setting.
Holy sh*t, dude. Someone just sprayed a hot summer's deuce all over that f*cking Porta John!
Middle of the summer and you have a ripe case of swamp ass, perhaps you are out cutting grass or attending a baseball game. Suddenly the uncontrollable dump sensation sets in and you scurry to the restroom but don't make it and the dump falls out onto the ground.