So I was bored, and I decided to খুঁজুন 'fangirl' on Dictionary.com (sponser!) and this is what it gave me:
fan·girl [fan-gurl] noun Informal: Often Disparaging. an obsessive female fan, especially of something technological অথবা from জনপ্রিয় culture: a Web ফোরাম for তারকা Wars fangirls.
So naturally, I went even further:
The term fangirl can be used to describe a female member of a fandom community (as opposed to the masculine " fanboy"). However, it is most often used in a derogatory sense to describe a girl's obsession with something, most commonly a male teen idol অথবা an aspect of Japanese...