| FBI | Bad Intelligence 
| Others |
| FBI | F***ing Bitching Idiots
| Others |
| FBI | F***ing Bunch of Idiots
| Others |
| FBI | Fabulous Babes of Interlachen
| Others |
| FBI | Fabulous, Beautiful, and Intelligent
| Others |
| FBI | Facebook Intensity Scale
| Others |
| FBI | Facilitators of Banner Instruction
| Others |
| FBI | Faith Being Investigated
| Others |
| FBI | Faith By Intercession
| Others |
| FBI | Famous But Incompetent
| Others |
| FBI | Fantasy Based Idea
| Others |
| FBI | Far Behind Intelligence
| Others |
| FBI | Farm Builders, Inc.
| Others |
| FBI | Farm Bureau Insurance
| Others |
| FBI | Farts Burn Intensely
| Others |
| FBI | Fast Breaking Information
| Others |
| FBI | Fat Barbies Idolized
| Others |
| FBI | Fat Bellied Inbred
| Others |
| FBI | Fat Big Italian
| Others |
| FBI | Features Benefits Information
| Others |
| FBI | Federal Bacon Investigation
| Others |
| FBI | Federal Baseline Intelligence
| Others |
| FBI | Federal Beuro of Investigation
| Others |
| FBI | Federal Blonde Intelligance
| Others |
| FBI | Federal Bobcat Investigator
| Others |
| FBI | Federal Boobie Inspector
| Others |
| FBI | Federal Booty Investigator
| Others |
| FBI | Federal Buisness Industry
| Others |
| FBI | Federal Bunk Inhalers
| Others |
| FBI | Federal Bureau Investigation
| Others |
| FBI | Federal Bureau Investigators
| Others |
| FBI | Federal Bureau of Illusions
| Others |
| FBI | Federal Bureau of Imagination
| Others |
| FBI | Federal Bureau of Incineration
| Others |
| FBI | Federal Bureau of Incompetence
| Others |
| FBI | Federal Bureau of Ineptitude
| Others |
| FBI | Federal Bureau of Insubordination
| Others |
| FBI | Federal Bureau of Interconnection
| Others |
| FBI | Federal Bureau of Intoxication
| Others |
| FBI | Federal Bureau of Intrusion
| Others |
| FBI | Federal Bureau of Investigation
| Agency, Intelligence Agency, Police, Crime |
| FBI | Federated Bastion of Independence
| Others |
| FBI | Federation of British Industry (later C B I)
| Others |
| FBI | Federation of sodomite Iran
| Others |
| FBI | Feeble Brained Incompetents
| Others |
| FBI | Feed Bag, Inc.
| Others |
| FBI | Feeling Beer Itch
| Others |
| FBI | Feeling Brutally Inclined
| Others |
| FBI | Fellowship Bible Institute
| Others |
| FBI | Fellowship of Bible Investigators
| Others |
| FBI | Female Body Inspector
| Others |
| FBI | Female Body Inspectors
| Others |
| FBI | Female Body Investigator
| Others |
| FBI | Fender Bender International
| Others |
| FBI | Ferris Bueller Imitators
| Others |
| FBI | Fidelity Bravery and Integrity
| Others |
| FBI | Fidelity, Bravery, Integrity
| Others |
| FBI | File Bunglers, Inc.
| Others |
| FBI | Find Boys Immediately
| Others |
| FBI | Find Boys Immediatley
| Others |
| FBI | Fine Babe Inspector
| Others |
| FBI | Fine Boundary Interpolation
| Others |
| FBI | Fine, Beautiful, and Intelligent
| Others |
| FBI | Finest Bar In ....
| Others |
| FBI | Fingerprint Biometric Identity
| Others |
| FBI | First Baltic International
| Others |
| FBI | First Burnout Incarceration
| Others |
| FBI | Fish-Based Interface
| Others |
| FBI | Fizz and Boog, Inc.
| Others |
| FBI | Flexible Bus Interface
| Others |
| FBI | Flying Bike Industries
| Others |
| FBI | Foliar Browse Index
| Others |
| FBI | Food & Beverage International
| Others |
| FBI | Food and Beverage Institute
| Others |
| FBI | Food Borne Illness
| Others |
| FBI | Foolish Banner Investigation
| Others |
| FBI | Foolish Bungling Idiot
| Others |
| FBI | Fools Bureau of Ineptitude
| Others |
| FBI | Fools, Buffoons, and Idiots
| Others |
| FBI | Forever Bothering Italians
| Others |
| FBI | Forever Buggin Italians
| Others |
| FBI | Forget Bout It
| Others |
| FBI | Found Beer Inside
| Others |
| FBI | Four Basic Improvements
| Others |
| FBI | Fourier-Bros-Iagolnitzer transformation
| Others |
| FBI | Fragged By Intelligence
| Others |
| FBI | Frame Buffer Image
| Others |
| FBI | Free Broadcast Incorporated
| Others |
| FBI | Frequent Blunders and Incompetence
| Others |
| FBI | Frequently Bungled Investigations
| Others |
| FBI | Fresh Blood Imaging
| Others |
| FBI | Fried Beyond Identification
| Others |
| FBI | Friendly Bot Interaction
| Others |
| FBI | Friendly Bus Investigator
| Others |
| FBI | Friendly But Ignorant
| Others |
| FBI | Friends Behind Internet
| Others |
| FBI | Friends Beyond Infinity
| Others |
| FBI | From Big Island
| Others |
| FBI | Front Beam Iron
| Others |
| FBI | Front Board of Idiots
| Others |
| FBI | Frontal Behavioral Inventory
| Others |
| FBI | Frontend-Backend Integration
| Others |
| FBI | Fruity-Bearded Indian
| Others |
| FBI | Full Blood Irish
| Others |
| FBI | Full Blooded Indian
| Others |
| FBI | Full Blooded Italian
| Others |
| FBI | Full Blown Insanity
| Others |
| FBI | Full Breasted Italian
| Others |
| FBI | Fully Blessed Individual
| Others |
| FBI | Fully Blew It
| Others |
| FBI | Fully Broken and Injured
| Others |
| FBI | Fumbling Botched Investigations
| Others |
| FBI | Fumbling Bumbling Idiot
| Others |
| FBI | Fumbling Bumbling Incompetence
| Others |
| FBI | Fun Bira Investigation
| Others |
| FBI | Fundamentalistic Bikers
| Others |
| FBI | Fungus, Bacteria, and Invertebrates
| Others |
| FBI | Future Basic Investigators
| Others |