1 不流行
unprevalent unpopular unfashionable unhip unmodish out unpopularity out of style out-of-date squaresville out of vogue
2 过时
back vintage medieval outdated backward obsolete old-fashioned dated out-of-date moldy outmoded unfashionable passe antediluvian superannuated rinky-dink demode behindhand out antiquate dead as a dodo out of vogue