a gradual transition into the realms of trisomy 21 usually occuring after adolesence
symptoms include:
a gradual lowering of the i.q.
tounge lolling
compulsive masturbation
symptoms include:
a gradual lowering of the i.q.
tounge lolling
compulsive masturbation
by Andrew LanDOWNS January 22, 2009

When parents are trying to call their teenagers to tell them that it is time to come home and the teenager for some apparent reason does hear the cell phone ring so that they can stay out longer with their friends.
While trying to call my son to tell him that he is out past his curfew and needs to come home, he contracted
Cell-U-Lar Onset Deafness, and does not hear the phone call from his mom.
Cell-U-Lar Onset Deafness, and does not hear the phone call from his mom.
by peaceangel22 June 29, 2011

The man walking down the street alone at night in Chicago suddenly had a terrible case of Rapid Acute Onset Lead Poisoning and died right then and there.
by Robjef622 May 8, 2017

When someone, through some means (usually weight loss), gains a large and sudden boost to their confidence that turns them into egotistical dickheads. It can also exacerbate egos for people who were faking it and now that they have real confidence it makes them appear like they're bragging all the time.
Fella: Hey, did you see that Gary lost a ton of weight recently?
Mate: Yeah! Notice how he hates fat people now? And he scoffs at chicks that he previously would have crawled dick first through a valley of glass just for them to notice him?
Fella: I have!
Mate: Ya boy's got a bad case of Sudden Onset Confidence Syndrome.
Mate: Yeah! Notice how he hates fat people now? And he scoffs at chicks that he previously would have crawled dick first through a valley of glass just for them to notice him?
Fella: I have!
Mate: Ya boy's got a bad case of Sudden Onset Confidence Syndrome.
by RussNuts July 16, 2019

"Don't be a sod."
Billy: Hey dude, wanna go to the movies today?
Todd: No dude I got in with the wrong crowd, now I have sudden onset douchebag syndrome.
Billy: Hey dude, wanna go to the movies today?
Todd: No dude I got in with the wrong crowd, now I have sudden onset douchebag syndrome.
by Toddthedouche January 13, 2011

a condition where someone (often a boy/ man) has some form of country background but it doesn’t manifest until triggered by either severe trauma or grief at the ages 16-50. Takes 4-12 months to fully run its cycle. Currently incurable. Defined by 4 stages:
Stage 1: Painful event happens to patient.. someone puts them on country music. Stage 1 consists of discovering country music and 1-5 artists they like.
Stage 2: 1-3 months of country music leads to a lifestyle change… different speech, accent, minor aesthetic changes. Drinking cold beer is not mandatory, but often accelerates progress. Some people stay here for years. others progress further.
Stage 3: If yet another event occurs, and country music or life yet again is used to recover, then they will fall deeper into the redneck lifestyle.. more severe lifestyle changes include buying a pickup truck, buying a diesel pickup, talking about pickup trucks, and buying their first pair of cowboy boots. Also includes raving about coors beer.
Stage 4: The person has made full transformation to a redneck, at least in some capacity. They will always love the life in the country, and the taste of coors beer on a friday night. Texas roadhouse is a first choice forever.
Stage 1: Painful event happens to patient.. someone puts them on country music. Stage 1 consists of discovering country music and 1-5 artists they like.
Stage 2: 1-3 months of country music leads to a lifestyle change… different speech, accent, minor aesthetic changes. Drinking cold beer is not mandatory, but often accelerates progress. Some people stay here for years. others progress further.
Stage 3: If yet another event occurs, and country music or life yet again is used to recover, then they will fall deeper into the redneck lifestyle.. more severe lifestyle changes include buying a pickup truck, buying a diesel pickup, talking about pickup trucks, and buying their first pair of cowboy boots. Also includes raving about coors beer.
Stage 4: The person has made full transformation to a redneck, at least in some capacity. They will always love the life in the country, and the taste of coors beer on a friday night. Texas roadhouse is a first choice forever.
Johnnys girlfriend broke up with him and now he likes zach bryan and says y’all a lot? Must be in stage 2 late onset redneck syndrome. .
by lefpudeler December 10, 2023

They should've given Akane a longer solo, but the main focus of Onset is, of course, Her Shreddiness, Kanami.
by TeaN'All February 3, 2020
