"FU" most commonly refers to an internet slang abbreviation
for "fuck you". It is also a song by Miley Cyrus, a traditional Japanese wheat gluten food, a Chinese character for luck, or a, chemical compound (5-FU Could mean F universal F Youtube Anybody that repeatedly uses it in My opinion is normally Fucked Up Now is you are a student of the intellectual communuity I think Freud would have to declare that 99 Percent of the people that use the word F You