F ur mother
You shout it when your bros are too selfish to share the last burrito and you get stuck with a sad taco.
I said 'Fur mother!' when my bros took the last burrito and I had to eat a sad taco.
I shouted 'Fur mother!' when my bros ate the last burrito and I got stuck with a cold taco.
I yelled 'Fur mother!' when my bros took the last burrito and I had to eat a soggy taco.