It's a figure of speech that means 'to welcome'. When you welcome someone close to you, you may hold your arms out to them, rather than folding them defensively. Thus you are welcoming them 'with open arms'.
This is not an idiom. It actually means to stretch your arms and legs. To take a break.
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To be exposed
Origin "up a storm"
No
This idiom gives the image of someone with their arms spread out to either side. You say this when you're about to hug someone. You might also use it to mean any inviting stance.
Palestinian and Persian
affrica (iraq
grab a bite
It was in 1960 in America
It is just an idiom and has no history.
food