FU
1. What does FU stand for?
F*** you
CensoredExample
"You smell like expired milk."
"FU!"
"FU!"

You might get an "FU!" out of this woman
Related Slang
Usage
Last Updated: May 7, 2019
2. What does FU stand for?
Fully understood
Can be used within a sentence or as a standalone response; may want to avoid using because of the other meaning of FU.
Example
"Yes, I FU what you said."
Related Slang
Usage
Last Updated: January 27, 2014
FU is an acronym that is used as a censored substitute for the "F*** you" phrase. It is most often spoken out loud or used in texts or online.
The two-letter acronym is typically utilized by people that don't want to swear but are really angry or in a bad mood. It is a popular comeback after getting dissed but not having anything clever to say.