Is slang for when you go to take a dump after eating spicy food and you get that hot and sometimes unbearable burning sensation at your butthole. You know you have had firehole before if you have ever felt the need to sit in ice water after or during a hot dump. Firehole can be bad and will force you to take small breaks between turds so your butthole can cool off.
Man that chili gave me some bad firehole this morning.
by jwatkins936 November 13, 2013