[two characters are arguing in a break room, coffee machine and all]
[teal, holding a coffee cup] Without mentioning avocado, explain to me what guacamole is
[purple, taken aback] Huh?!
[zoom on teal's very smug face, the coffee steaming in front of them] I knew it You can't Your guac ideology doesn't work Heh Pft Owned
[purple looks blasé and has no words]
"Come off" is possibly a fluent English expression here. Taken literally anything that is removed from a plant has come off it. You're using the expression which means something produced by the plant that is edible by function and doesn't harm the plant to remove, usually as part of seed dispersal. E.g. fruits, nuts, berries squash, corn, grains, etc...