Eat the apple
'A zebra doesn't eat apples' is a saying that means something like cut the crap. It's for when someone is being a total f***ing idiot.
My brother said 'A zebra doesn't eat apples' when I told him I failed my math test. He was being a f***ing idiot.
My friend said 'A zebra doesn't eat apples' when I asked if he wanted to go to the park. He said no.
My teacher said 'A zebra doesn't eat apples' when I talked during class. I was being a f***ing idiot.