string bean
US /ˈstrɪŋ biːn/
UK /ˈstrɪŋ biːn/

1.
a long, thin green bean, eaten as a vegetable
:
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She added fresh string beans to the stir-fry.
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My grandmother's garden always had plenty of string beans.
2.
a tall, thin person
:
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He's such a string bean, always towering over everyone.
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Even as a child, she was a little string bean.