To rob the cradle British American to-infinitive disapproval offensive informal
This is an English idiom that similar to a Vietnamese idiom "Old buffalo grazes on young grass". It means to date or having relationship with someone that is significantly younger than yourself, or it could mean to take a liking to younger people.
But suddenly Taylor looked bad, robbing the cradle for a high school student.
Oh that teacher robs the cradle usually. You are a girl and your score will be high.
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Minh Slim is dating a secondary schooler. He is obviously robbing the cradle
Believe that someone is a perfect person with no faults
Loving gestures of couples such as petting, kissing, and cuddling
(Of women)To try to gain love or affection of a man, especially when a woman wants a man to be her husband or lover
Wholly enamored (of someone)
Used to imply a place where two lovers can get a strong feeling of romantic attraction together, especially hidden from others
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Rob means to steal and cradle is a bed for a baby. Therefore, someone who robs a cradle, in a literal sense, is stealing a young baby from its cradle, away from its mom and dad.
The figurative sense uses this imagery to imply that an older person dating a much younger person is also stealing a child away from his or her parents. This expression originated in the first half of the 1900s.
A lesser-used meaning involves any type of exploitation of the very young.