What does bacon-slapping mean?

bacon-slapping meaning in Urban Dictionary

a-game played by sneaking up on an indivial and slapping them. Principles consist of having to shout "BACON SLAP!!!" before striking the individual. If indivial being tricked imitates the sound of bacon frying before he/she is slapped, the slapper must pull his/her nostrils back and snort loudly like a pig.