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."
by Katie Marie Bell October 4, 2011
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