fight like cats and dogs
US /faɪt laɪk kæts ænd dɔɡz/
UK /faɪt laɪk kæts ænd dɔɡz/

1.
像猫狗一样打架, 激烈争吵
to argue or fight fiercely and constantly with someone
:
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My siblings always fight like cats and dogs over the smallest things.
我的兄弟姐妹总是为小事像猫狗一样打架。
•
The neighbors fight like cats and dogs, so we often hear their arguments.
邻居们像猫狗一样打架,所以我们经常听到他们的争吵。