When someone decides not to show up for something he/she was supposed to, going apeshit on that person is basically the same as bitch-slapping them... It also includes punching them in the arm at some random time of the day.
"Zach, you better be at the next bus stop, or I'm gonna go ape-shit on you."
"Trust me, if I have to, meet me in the alley and I will Go Ape-shit on You."
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. PenguinBooks,1992. p. 38)