Smoke grenade

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A smoke grenade is a canister-type grenade used as a signaling device, target or landing zone marking device, or as a screening device for unit movements.^[1][2]

Smoke grenades are generally more complex and emit a far larger amount of smoke than smoke bombs, which are a type of firework typically started with an external fuse rather than a pin. Smoke grenades often cost around US$40 compared to smoke bombs, which can often cost just a few cents. The phrase "to smoke", meaning to fake, bluff, or beat around the bush, comes from the military usage of smoke grenades to obscure and conceal movement;^{[citation needed]} similarly, "pop smoke", derived from a common way of ordering the use of smoke grenades, is used as a slang term for quickly leaving a place.^[3]