big craze; boom; popular trend; widespread contagion; large outbreak
buzzword; vogue word; popular phrase
out of fashion; out of style; outmoded
fashionable color; fashionable colour
infected district; infected area; endemic area
popular singer; singer of pop songs
the principle of fluidity and immutability in haiku; Haiku is both "fluid and transitory" and "eternal and immutable."; An interchange between the transient and the immutable is central to the soul of haiku. (Basho)
the cream (pink) of fashion