A term used by fat women who masturbate to their television set, meaning "French Fries," but also "I'm a piece of trash for using this phrase."
I am a fat woman so I like to eat Liberty Fries and masterbate while watching young Americans die half way around the globe.
After the attack of 9/11, Americans felt the need they needed to rename the French Fries to something more american-like. So they decided to rename them to Liberty Fries.
"Hey! I just got back from Jack In the Box."
"Really? Did you bring me anything?"
"I got you a Jumbo Jack with some Liberty Fries."