the feathers/fur/sparks will fly

the feathers fly

There is an argument. When the feathers fly, I'm making myself scarce—there's no way I'm getting roped into a fight between those two. You can be sure that the feathers will fly if the president vetoes the bill that both sides of congress worked so hard to pass.See also: feather, fly

the fur will fly

there will be serious, perhaps violent, trouble. informal This phrase originated in the early 19th century, in the US. The image is of a furious fight between dogs or cats.See also: fly, fur, will

the ˌfeathers/ˌfur/ˌsparks will ˈfly

(informal) there will be anger, annoyance, etc: The fur will really fly when she tells him he can’t go out tonight.See also: feather, fly, fur, Sparks, will