be a slave of (something)

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be a slave of (something)

To be unduly influenced by or care too much about something; to spend too much or time or energy on something. Jeremy is a total slave of fashion. He can't leave the house without making sure every part of his outfit matches perfectly.
See also: of, slave

be a slave to/of something

be a person whose life is completely controlled by something, for example a habit, a job, an interest, etc: She’s a slave to fashion; she’s always buying new clothes.
See also: of, slave, something
References in classic literature ?
A doorkeeper, named Sangiar, who had been a slave of Khacan's, hearing this order given, slipped out of the king's apartment, and hastened to warn Noureddin to take flight instantly with the beautiful Persian.