noun
a person who resembles one of their parents in character or behavior
preposition
a word governing, and usually preceding, a noun or pronoun and expressing a relation to another word or element in the clause
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The young man is a chip off the old block, following in his father's footsteps in the business world.
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That kid is a chip off the old block, always cracking jokes just like his dad.
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She's a chip off the old block, always wearing the latest trends just like her mom.
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The new employee is a chip off the old block, showing the same dedication and work ethic as his predecessor.