cougar
US /ˈkuː.ɡɚ/
UK /ˈkuː.ɡɚ/

1.
a large American wild cat with a tawny coat, found from Canada to Patagonia.
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The cougar stalked its prey silently through the dense forest.
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Cougars are also known as mountain lions or pumas.
2.
an older woman who seeks sexual relationships with significantly younger men.
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She was often described as a cougar because of her preference for younger partners.
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The term 'cougar' is often used informally and can sometimes be considered derogatory.