Racial injury abbreviated from Fuck You Nigga. Used to trigger people who transform words with a certain meaning, to mean something that's advantageous to their cause.
The abbreviation of Fuck(F) You(U) N.I.G.G.E.R(N). Used to make fun of people who use words that are not offensive, but they correlate the non-offensive words to offensive acts like : Hating white paper because it's white.