When you're drinking a beverage, and taking a piss, at the same time. So named after a technique to rapidly turn-around helicopters, refueling while the engine is stillrunning, here you're "refueling" while "burning gas".
"Hold on man, I'm going to take a piss"
"Want me to hold your beer?"
"Nah, I'll just hot refuel"
"I went to go take a piss, and wanted a beer. Welp, guess I'm hot refueling this time"
Fogey/fogy /fougi/ sl. (early 18C+, orig. Scot) old-fashioned, stuck-in-the mud.
Person with old fashioned ideas which he is unwilling to change: Come to the disco and stop being such an old fogey!
You think me an old fogeyand an old tory, his thoughtful voice said. I saw three generations since O’Connel’s time. I remember the famine. Do you know that the orange lodges agitated for repeal of the union twenty years before O’Connel did or before the prelates of your communion denounced him as a demagogue? You fenians forget some things. (James Joyce, Ulysses. Penguin Books,1992. p. 38)