Fashion victim
Meaning
Someone who slavishly follows fashion trends.
Origin
This term came into prominence in the 1970s and 80s. It is an older phrase than that though and was in common use in the 1930s; for example, this piece from the Utah newspaper The Ogden Standard-Examiner, July 1932:
It's a person who crosses the boundaries of fashion and style, like taking a fad too far, or wearing too many trends at once and therefore taking the look from the glamourous to the ridiculous. It is also a person who tries to draw admiration through the designer brands (or a shameless copy of them), wearing labels- regardless of fit or personal style- and becoming a "walking billboard"!
Sources:
phrases.org.uk
urbandictionary.com
Other Links:
Down the tubes
Two Useful Phrases