a knight in shining armour
US /ə naɪt ɪn ˈʃaɪnɪŋ ˈɑːrmər/
UK /ə naɪt ɪn ˈʃaɪnɪŋ ˈɑːrmər/
1.
a man who comes to help someone in a difficult situation
:
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She was waiting for a knight in shining armour to rescue her from her troubles.
•
He appeared like a knight in shining armour when I needed help the most.