Boong-Ga Boong-Ga (Korean: 붕가 붕가, Japanese: 開ウン！ケダモノ占い[1]), sometimes advertised in English as Spank 'em, is an arcade game developed by a South Korean company, Taff System.

The game received infamy on the internet (where it was often misattributed as Japanese) in 2001 for a badly translated advertising flyer that promoted the game's peculiar spanking and kancho oriented gameplay.

The game features eight characters players can punish: "Ex girlfriend", "Ex-boyfriend", "gangster", "Mother in law", "Gold-digger", “Prostitute", "Child molester", and "Con-artist".

During gameplay, the facial expression of the chosen character is displayed on a monitor.

[7] The game also dispenses cards that rate players on their "sexual behavior", and for players who perform exceptionally well the machine will dispense a small plastic trophy in the shape of a pile of feces.