Poop (船尾) is the waste most living creatures leave behind from digesting their food. In real life, it is brown, but in Dr. Slump, it comes in several different colors and are all living entities.
It is seen early in the series, in chapter 19: "At Last... the Dragon!", Mai is seen holding poop on a stick and Emperor Pilaf criticizes that she is making a Dr. Slump reference. As a joke by Akira Toriyama, Pilaf's states to Mai that Shonen Jump has actually been a lot more sophisticated and intelligent since Dr. Slump has finished and that she should not ruin it.
None of the living Poops appeared in the Dragon Ball manga during the General Blue Saga, but they did in Dragon Ball anime filler. Poop-Boy, Manure-Boy and Bird-Poop-Boy is seen watching Arale race the Gatchans. When Arale accidently smashes the car General Blue stole from the police, Arale offers him some poop on a stick which he rejects in disgust. Afterwards, both the Gatchans lift up a giant poop and Arale states "would you like another flavor?"
Video game appearances
Poop are used as weapons by the Dr. Slump characters in the crossover games Jump Ultimate Stars and J-Stars Victory Vs. They also appear in the other Nintendo DS games Dr. Slump: Arale-Chan and the Dragon Ball: Origins games.
In Dragon Ball: Origins, during the battle of she and Shu against Goku at Pilaf's Castle, Mai chases Goku around in an attempt to touch him with a pair of electric pink poop on sticks. When her attack hurts Goku, the poop spreads all over the screen, making it harder to see. In its sequel Dragon Ball: Origins 2, living Poops are regular enemies encountered in Penguin Village.
In the computer game Dragon Ball Online, electric poop on sticks are used as weapons by flies.
In the fighting game Dragon Ball Z: Battle of Z, Mr. Poo (poop on a stick) is an item that slightly increases the speed of EN recovery.