Why does a slang word, “rack”, mean breasts? What's the derivation?

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Why does a slang word, “rack”, mean breasts? What's the derivation?

Can 'vixen' mean a sly woman? My dictionary says 'vixen' means a quarrelsome woman while 'fox' means 'sly person

Can someone explain this sentence? 'karma is a bitch' what does it mean ? actually i know the word 'karma' but why it being referred to as a bitch?

What does “drip” mean in American slang, referring to expensive jewelry?

Can someone explain this sentence? 'karma is a bitch' what does it mean ? actually i know the word 'karma' but why it being referred to as a bitch?

Why does a slang word, “rack”, mean breasts? What's the derivation?

What does “make some dough” mean? Does dough also mean money somehow in slang? Is it a commonly used slang term?