Definition

Driving around with a completely full gas tank, giving you maximum range and the freedom to spontaneously road trip wherever without obsessing over the next gas station.

Example Usage

I'm F-tanking it this weekend, so I can take random detours without worrying about fuel economy.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=F-tanking%20It&defid=1943716)