Pingas is a Spa-Dinner sound that sounds like penis and originated from an Adventures of Sonic the Hedgehog episode("Boogey Mania") from a line spoken by Robotnik: Snoo(ping-as) usual, I see!
Because of the popularity of Pingas, a series of fan created computer games as parodies to Five Nights at Freddy's have been made. Such as Five Nights At Pingas which has five total games in the franchise.
According to Gwonam, it is written Pingas is synonymous to porn. Of course, we all know Gwonam is full of shit. A Pingas, as everyone knows, is the SpaDinner form of a dick.