Try this one:
A term invented by snowboarders in 2002 that meant "making up for a shitty trick by attempting to look relaxed and comfortable upon landing". So looked down upon that the collective "Robot Food" named a movie "afterbang" for the sake of making fun of it.
Later adopted by skiers, (circa 2007) assumed to be a good thing. Associated with the skier Tom Wallisch based on jokes people didn't understand.