be a slave to/of something

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 is perfect.
See also: of, slave
Farlex Dictionary of Idioms.

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
Farlex Partner Idioms Dictionary
See also:
  • a/the feel of (something)
  • (I) wouldn't (do something) if I were you
  • a straw will show which way the wind blows
  • a crack at (someone or something)
  • all right
  • (you) wanna make something of it?
  • all for the best
  • a thing of the past
  • a slew of (something)
  • a bird in the hand