anal fire 

The result of lighting farts (methane gas expelled from the body due to digested food) without the protection of trousers or pants, causing in some cases burning of the ring piece.

Tubby lit a fart while naked and burnt his arsehole, flames shot from his ass. the anal fire was seen for miles.

anal fire by JR in guersney April 23, 2006

anal firecracker 

The action of inserting a firecracker into ones anus for sexual thrill

Me and Pat performed the action of the anal firecracker and had sex to see who could finish before it blew up

anal firecracker by Muffinlover69 February 19, 2017

Anal Fireball 

The act of inserting hot sauce into one's girlfriend's anus promptly before engaging in anal sex with her, which is subsequently followed by her taking a dump on your chest.

Hey Derek! I heard your sister gave you the biggest anal fireball ever last night!

Anal Fireball by samuel64 June 27, 2009