noun
a sideways movement, especially one that is sneaky or cautious
verb
to move sideways in a stealthy or cautious manner
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The waiter would sidle up to the table discreetly to take their orders.
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I saw him sidle over to her at the party, trying to strike up a conversation.
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The cat tried to sidle past the dog without getting caught.
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She always seemed to sidle her way into important conversations and decisions.