Your first year in real estate, every term is a new term.
Your 16th year, not so much . . .
Now, I’m lucky if I learn 1-2 new (to me) real estate terms per year — usually at a continuing ed class I attend outside my region.
Egg Soot on Your Face
So, at least one Ohio Realtor has dealt with the (very unpleasant) aftermath of a “puff back”: apparently, what happens when the residual soot from an oil-burning furnace spontaneously combusts, sending smoke and fine particles throughout the house via the air ducts, in the process coating walls, floors and any other home surfaces with a noxious film.
Uggh (or as the locals say, “Uff-dah!”).
Twin Cities agents seldom (if ever) encounter the term, because furnaces locally are overwhelmingly gas-burning.