(Aka Catastrophic Anthropogenic Global Warming)
A skeptic term that denotes "anthropogenic global warming (AGW) that causes a catastrophe" — e.g. that causes a 100-meter sea-level rise.
1. I've only seen the word in print, so I'll guess that it is pronounced Cag-Wa, and that it rhymes with Managua; thus the mnemonic "The CAGW warmed the agua in Managua."
Example Usages -
1. "Core to this issue is the claim that AGW is dangerous. The disagreement between sceptics and the faithful is that the latter believe AGW will be catastrophic (CAGW), and key to that is feedback."
(Source: John Nielsen-Gammon, Skeptics Are Not Deniers: A Conversation (part 1) )