greenout

plural greenouts

1. countableuncountableAntarcticaThe sensation caused by seeing plants again after a period in Antarctica.

   Maybe a trip to the greenhouse will lessen my feeling of greenout when I go north?

   2008 December 10, Mittlefehldt, David "Duck", “The Antarctic search for meteorites: preparations”, in The Planetary Society blog

   1 more example

   One of my favourites is 'greenout', for which I only found a single quotation, which is the experience you have when you've been in Antarctica which has very little vegetation, no trees or shrubs, not many smells of the vegetation, and you come back after weeks, months or a year or more to a vegetated place and the warm air is blowing off the continent that you're coming towards and you have a 'greenout' - you're overwhelmed by the sensations.

   [2001 June 9, Bernadette Hince, “Antarctic Dictionary (transcript)”, in The Science Show, Australian Broadcasting Corporation

2. countableslanguncountableA feeling of sickness as a result of consuming excessive amounts of cannabis.

   One name gaining popularity is "greenout," which is when someone gets sick after smoking or eating cannabis.

   [2018 September 10, Dave Dormer, “Why overdose may be the wrong word when it comes to cannabis”, in CBC

   2 more examples

   It [The Cannabis Kitchen Cookbook] also offers constant reminders about dosages and prudent consumption, so that noobs don’t do a Maureen Dowd and abandon pot after a single greenout.

   2015 September 25, Jason Wilson, “I tried recipes from the Cannabis Kitchen Cookbook, then I needed a long nap”, in The Guardian

   Students were also asked if they had ever witnessed or experienced "negative health effects" due to smoking weed or vaporized THC. These effects were defined as any kind of adverse reaction to inhaling a substance, most commonly reported as asthma attacks, seizures or "greenouts" — an experience where one dissociates from their body, similar to sleep paralysis.

   2019 October 16, Aiza Bhuiyan, Sophie Partridge-Hicks, Gabe Samandi, “UPDATED: Clearing the Air: Addressing The Misconceptions about "E-Cigs"”, in Fordham Observer

3. CaliforniacountableinformaluncountableroadA green sign patch applied to a guide sign.

   At Norwalk Blvd, the greenout covers a SR-35 shield.

   2013 February 13, Michael F. Ballard, “5n-norwalk-blvd-sign”, in Southern California Regional Rocks and Roads, retrieved 07 Aug 2025

   2 more examples

   There's again the greenout for "West," but what would have been greened out underneath "Junction"?

   2012 October 22, Steve Alpert, “I-805 northbound”, in Alpsroads.net, retrieved 07 Aug 2025

   Porcelain-on-steel signs really can't be drilled without rusting, although Caltrans apparently does this often and this is a major cause of overlay plates ("greenout") falling or dangling off of signs.

   2020 July 5, Daniel P. Faigin, “Highway Numbering in California: Signing in California/Signing Standards”, in California Highways, retrieved 07 Aug 2025