Noun. Substance applied to food to increase spice, to make more intense. If describe as figuratively applying to an item, referenced item would increase in intensity, pace, speed or importance.
by scarface1978 March 08, 2012

A hot girl in the drive thru or lobby at taco bell. Used as code so the female isn't aware that all the employees are staring at her.
by Kevintaco October 22, 2007

The best and most highly regarded descriptor that one can use in reference to an object or event when evaluating said item's worth based on the Taco Bell Sauce Scale (or simply "Sauce Scale"). The term "Fire Sauce" is used to describe a girl that is banging, a badass object, delicious food, or an idea or event that is totally off the hook. Items that are declared as "Fire Sauce" are vastly more cool than items declared Mild Sauce, and slightly more B.A. than items declared Medium Sauce.
"Yo man, your Integra is fire sauce, dude."
"Thanks, man. I spanked two dudes in a Mustang earlier."
"HOLY SHIT! Did you guys just see that chick that walked past? She was total fire sauce!"
"Thanks, man. I spanked two dudes in a Mustang earlier."
"HOLY SHIT! Did you guys just see that chick that walked past? She was total fire sauce!"
by De La Nooch November 02, 2008

by Grant Lund August 27, 2008

Taking more fire sauce than is recommended or needed in an attempt to deplete the sauce reserves at taco bell in a single trip. The adrenal rush that results is akin to robbing a bank.
Fire Sauce Raid '08! 119 Fire Sauces today! The heat we felt from Joguina was almost as hot as the sauce itself. She was eyeballing us like a prison guard as I emptied the tray..
by AMaubrey February 18, 2009
