A "mixture of excrement, noxious gas and a decomposing donkey"

That's one description of Skunk:

Imagine being soaked, head to toe, in a frothy mix of pureed compost, gangrenous human flesh, and road kill, and you might get some idea of what it’s like to be sprayed with Skunk, according to those who’ve had the misfortune of being doused.
Police departments in the United States have reportedly begun purchasing the spray, a non-lethal riot-control weapon concocted by an Israeli firm for use against demonstrators in the occupied West Bank. The sticky fluid, which Palestinians say smells like a “mixture of excrement, noxious gas and a decomposing donkey,” is usually fired from armored vehicles equipped using high-pressure water cannons.
Mistral Security, a firm based in Bethesda, Maryland, markets Skunk to U.S. police and military as a crowd-control tool capable of “rapidly and effectively” dispersing unruly crowds. Recommended applications include “border crossings, correctional facilities, demonstrations and sit-ins.”
Mistral Security offers a number of delivery systems for Skunk, according to the company’s website, including 60 ounce canisters with a range of 40 feet; a “skid sprayer” equipped with a 50 gallon tank and a 5 hp motor that can shoot over 60 feet at up to 7 gallons per minute; and a 40mm grenade that can fired by a 12-gauge shotgun.