when 3 or more men dig up a dead rotting corpse and proceed to have sex with it. as the body is dead, there will be no problem creating new orifices so more can fuck it at once, afterwards leaving the corpse looking like an over-loved hunk of swiss cheese.
The act of quckly posting a negative review on a bad product or service because the deliverer of the product refused to offer any refund or proper replacement.
Nacho Mammas restaurant charged me $20 for a jumbo Margarita that contained not even the slightest trace of Tequila. I immediately went to their reviews and Neg Banged them.
To have silent sexual intercourse on the floor with minimal clothes removal, as to avoid discovery of fornication. Usually done by people who still live with their folks or prudish friends.
Juan: yo, we gonna have to ninja bang today, mamacita, cuz my folks are in the next room