I don't know why they used this word on their site, because it is an adjective anyway, f.e. You can use it like:
большие города - big cities
большие неприятности - big troubles
большие дома - big houses
большие сиськи - big tits - and because of this one and same of this (cocks, fotos etc.) this word has good wordstat in yandex
I don't shure about trends...
So I advise to park it and watch - if there is a traffic - why not keep?