This is the term used whenever something is done to someone in a harsh manner, whether it is playful or serious. A combination of the words, "got yo ass".
When you dunk on someone... "gotchoass"; When you prove somebody wrong..."gotchoass"; when you tricksomeone, hit someone, or anything else that excites you and upsets them..."GOTCHOASS"
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)