$100 hamburger 

A restaurant/diner that is popular with private pilots. Generally located on an airport.

Hey man, lets fly to the next town over and grab a $100 hamburger!

$100 hamburger by HighFlyingA380 November 2, 2010

$100 hamburger 

A general aviation flight that involves flying a short distance, eating a meal, and flying back.

It’s called hunting the $100 hamburger — “$100” referring to the cost of fuel — sort of the aeronautical equivalent of lazy Sunday drives in which the destination isn’t as important as the pleasure of getting away.

$100 hamburger by Delbosco October 10, 2021