Bingo Fuel 

The absolute minimum amount of fuel required for an aircraft to return to an airport and conduct a safe landing.

"We are three minutes until bingo fuel. If you can't retrieve the rescue swimmer by then, we will leave him behind."

Bingo Fuel by pcbene June 30, 2017

bingo fuel 

An aviation term indicating that the aircraft has barely enough fuel to return to home base safely.

Negative home base, I'm running on bingo fuel. Request return to airfield.

bingo fuel by D-Man2426 December 19, 2013