cast pearls before swine
US /kæst pɜrlz bɪˈfɔr swaɪn/
UK /kæst pɜrlz bɪˈfɔr swaɪn/
1.
to offer something valuable or good to someone who does not appreciate it or cannot understand its worth
:
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Trying to explain advanced physics to him is like casting pearls before swine; he just doesn't get it.
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She felt like she was casting pearls before swine when she shared her intricate artwork with the uninterested crowd.