FUP or Fup may refer to:

• Fair usage policy
• Fair Use Project of Stanford Law School
• Federal Union Party, a political party in Myanmar
• Freshman Urban Program, at Northwestern University, Illinois, United States
• Firewall Update Project

• Fla. J. Int'l L.
• Flajolet-Martin algorithm
• Flajolet–Martin algorithm
• F.L.A.K.
• FlaK 18
• Flak 37
• Flak 40
• FlaK 58
• Flaka e Janarit
• Flaka Krelani
• Flak artillery
• Flak Attack
• Flak Bait (B-26)
• FLAK (disambiguation)
• FlaK (disambiguation)
• Flake (archaeology)
• Flaked
• Flaked (Netflix TV Series)
• Flaked (TV series)
• Flaked (TV Series)
• Flakefield
• Flake graphite
• Flake (KDE)
• Flake knife
• Flake salt