faddist
noun
- a person with a tendency to like a style, activity, or interest for a very short period of time
Wiktionary
noun
Etymology: Etymology tree English fad Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íďďō Ancient Greek -ῐ́ζω (-ĭ́zō) Proto-Hellenic *-tās Ancient Greek -τής (-tḗs) Ancient Greek -ῐστής (-ĭstḗs)bor. Latin -istader. Old French -istebor. Middle English -ist English -ist English faddist From fad + -ist.
- A person or entity given to following fads.
“He is such a fashion faddist.”
“The faddist magazines have been hyping that lately.”