The definition of "fuck lie" is where somebody is lying to you, and you know that they are lying to you, and you ask them

"did you steal money out of my wallet" and they say "no?"
Did you pull a "fuck lie" on me?
by BabbleBoy April 9, 2021
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When something is so false, that you cannot describe it any other way.
"Did you hear what Jimmy Long-Pants said about my mom? That was a flat-out fucking lie."
by Jimmy Long-Pants October 15, 2017
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