rant lion 

when people get caught up in an Internet argument or flame war and sink deeper and deeper into a pit of ugliness and shame (while their friends stand by silently or urging them desperately to climb out of the hole they've dug for themselves) they are inevitably consumed by the 'rant lion.'

Mike and Pat argued about Republicans vs. Democrats again on each other's Facebook, starting out courteously and fairly, but of course it quickly descended into a pit of vitriol and personal ugliness: fresh meat for the rant lion.

rant lion by zarathustra123 March 17, 2013