To profit from; to use an opportunity to maximum advantage, especially financially.(verb)
To die.(verb)
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Use "cash in" in a sentence
"Marketers have been quick to cash in on this nostalgia-driven craze."
"The only thing Carter Paragon ever cured was an excess of cash in a bank balance."
"He was referring to The Portable Atheist: Essential Readings for the Nonbeliever, edited by Hitchens, giving the publishing world yet another opportunity to cash in on the anti-God juggernaut.19"