Portmanteau of LEFT and FBI. The end result of years of infiltration into a once great agency by the left wing communists emanating from American academia.

Once the guarantor of freedom, the FBI is now nothing more than the KGB of the Democratic party, similar to CNN's role as the PRAVDA of America.
Johnny: When I grow up I want to join the FBI!

Father: You mean the LEFTBI? Son, you're better than that. The PC cretins and political hitsquads you'll encounter there will ruin your soul.
by Youtubeboobtube January 23, 2018
Get the leFtBI mug.