Related Clues:

• Rage that comes and goes
• Viral Facebook post, say
• Cyber phenomenon
• Viral internet thing
• Limits M?ni?re's syndrome going viral
• Short-duration craze
• Much-reshared post on social media
• 'Pokemon Go,' e.g
• Fast-spreading fad
• Following publicity? It’s a craze
• Cultural feature passed on by imitation
• Idea that spreads popularly and widely
• Something hot for a short time
• 'Thanks, Obama,' for one
• Fidget spinners, for example