Fug can refer to:
- FUG, a Hungarian armoured scout car
- Fug, a minced oath used by Norman Mailer in The Naked and the Dead
- The Fugs, a band who took their name from Mailer's minced oath
- Funkgerät (prefix: FuG), generic German WWII term for radio and airborne IFF, RDF and airborne and some ground based Radar equipment.