american idioms - Robuta Search

https://archive.org/details/americanheritage00amme_0/page/64/mode/2up?q=%22black+sheep%22

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Learn English by conversation, common mistakes, exercises, slang

https://en.wikipedia.org/wiki/Idioms_in_American_Sign_Language

https://www.lovetoknow.com/life/lifestyle/origins-quirky-american-phrases

We're so used to saying some of these things, they don't even sound strange to us. To non-Americans, though? They're a little confusing.