When you rip a chainsaw fart during an awful case of swamp ass that has the same sound, smell and consistency of slapping two pieces of lunch meat together.
I came home from a run and let out a BaloneySlapper so rancid my dog came to see if I was about to feed him.
A saying a person does when another person says an unfunny joke but you're being sarcastic about it, indicating it was the funniest joke you have ever heard in your life. (being sarcastic if you didn't get that)
Tankslapper is when a car has sudden oversteer due to many different conditions depending on suspension or drivetrain setup.
One possible origin for the word is old WW2 tank crew vetetans taking careers as racing drivers during 1950s and dubbing the natural effect of inertia as a "tankslapper" as the weight of a tank usually centered around the rear due to storing ammunition.
A sudden oversteer in a car caused by the rear-end being unsettled in a corner. Usually happens if the accelerator is pressed too hard or too early on corner exit. May be unpredictable and needs delicate steering and pedal work to correct depending on severity
Term is originally used in motorcycling, but is used interchangeably with cars and racing
Tarquini had a massive tank slapper on Copse corner and lost quite a lot of time before Maggotts and Becketts