Related Clues:

• Passing trend
• Hula hoop or pet rock
• It goes in and out quickly
• Pet Rock, e.g.
• Mood rings or the Macarena, once
• Crosswords, once
• Pet rocks, e.g.
• ''The Twist'' was one
• Cabbage Patch Kids or Beanie Babies
• Hula hoop, once
• Crosswords in the 1920s, e.g.
• Troll dolls, once
• Tongue tattoos, e.g.
• Phone booth stuffing, e.g.
• Something going out shortly