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1. Ass Fire
A severe pain in the anal region caused by prolonged periods of bicycle riding on an uncomfortable seat.
After cycling 60 miles his ass fire was so bad he said to the fireman, "I got a fire up inside my ass if you can put it out."
2. Ass Fire
Another name commonly used for the seat heater in a luxury car. It is very highly coveted and often requires a Shotty.
Passenger: Shotty ass fire!
3. Ass fire
A rare but frightening incident that occurs when the friction of rough anal sex causes dingleberries to ignite and catch the recievers ass on fire. Has only happened when a little too much alcohol was involved and the giver had a little too much lead in his pencil.
I used to date this one hot girl, but then she got drunk at a party with Chuck Norris and a horrible ass fire resulted.
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