Literally, "to make heat". Often used to describe over the counter compounds that allegedly unlock fat from cells so it can be burned, promoting weight loss. The use of this word in a product description is a sure sign of quackery, snake oil, and other miraculous curative nonsense.
Our amazing new thermogenic compoundwill help you shed those unwanted pounds in only 8 hours! Yeah, right.
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)