Related Clues:

• Angry harangue
• A trait passed down the generations — clamouring for attention?
• Bombastically declaim
• Shout wildly at length
• Fast-spreading Internet phenomenon
• Enthusiastic volunteer's cry
• Frequently shared thing
• Go on the warpath, verbally
• Piano-playing cat, once
• Twitter trending topic, maybe
• Vent with vehemence
• Cultural fad
• Lolcats, e.g
• Social-media phenomenon
• Rave that Egyptian Sun god is a nut case