A piece of fish-shaped plastic, usually made in China, designed to stick to the rear of mainly American owned vehicles to demonstrate to the rest of the world that the bearer prefers to ignore irrefutable evidence discovered by the most brilliant minds in science and base their smug, superior public personas on fairy tales and superstition, whilst engaging in closeted guilt-ridden sessions of drug-fuelled sexual deviance and other hypocrisy.
Rev. Ted Haggard, Newt Gingrich, Pat Robertson, God I hate those jesus fish people
When a person shoves their index finger all the way up the other person's ass and curls it in a "come hither" motion, resembling a fish hook. The Hooker then lifts the Hookee by the hook in their ass, suspending them like the Golden Gate Bridge by their asshole.
Bill thought he was getting a prostate exam, but was surprised by the doctor's unprofessionalism when it turned out to be a San Francisco Fish Hook instead.