over the edge
Insane, as in I think he's gone over the edge. This expression alludes to the edge of sanity. [1920s]
The Fierce Debate Over Twitter’s 280 Characters
We all know by now that Twitter raised their character limit to 280. Predictably, this change has inspired hilarious reactions online. Most users are downright gleeful they have a wee-bit more space to tweet. Others are upset, claiming this expansion will ruin Twitter by making it more like Facebook. A few grumpy tweeters have solemnly vowed to never compose a tweet that’s longer than the …
Warning: Swear Nerds Are Taking Over The Internet
A quick warning: there will be a lot of strong language ahead.
insane, unhinged, mental, demented, mad, schizophrenic, crazy, lunatic, nuts, sick, psycho, manic-depressive, distracted, psychopathic, unbalanced, certifiable
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.