From Longman Dictionary of Contemporary Englishbe a slave to/of somethingbe a slave to/of somethingEFFECT/INFLUENCEto be so strongly influenced by something that you cannot make your own decisions – used to show disapproval a slave to fashion → slave
Examples from the Corpus
be a slave to/of something• Gone are the days when those with the will to be chic had to be slaves of fashion.• This happened a mere seven or eight times a day and Jack was a slave to her whims.• We need not be slaves to our technologies.• He would not be a slave to wealth.• But most overseas buyers of the clothes are not sports fans - they are slaves to the fashion for Americana.• They are slaves to the prejudices of the epoch in which they were written.• You don't need to be a slave to fashion.• They both show how we are slaves of the car. 