It's the end result when a (much) older woman has sex with a younger lad, with tasty results. When the moment of truth comes, it's time for him to Feed Nana!
The phrase is known to have a compound meaning but this is the most widely accepted. It is believed to have originated from Alt-Right podcaster Anthony Cumia just before he was permanently suspended from Twitter in 2018.
Facebook friend on news feed's status update: "Is CONEY ISLAND stylin!!! Gonna be 105 degrees 2day, def on that Q train to the beach!!! happy bday shoutout to my dude Quichua!!!"
Feterinarius is a soldier in the digital army who serves as a surgeon of the electronics that power backbone of the the internet, ICSs and all that is controlled electronically.
John; The geek from IT really knows a lot about the history FETs and MOSFETs and how they've powered the digital age!
Richard: That's why they call him FETerinarius bro