When someone was ugly when they were young and is now sexy/looking good. They have ugly duck syndrome as they believe to be still ugly but are actually very good looking usually works well for the partner who met them when they were ugly. Ugly Duck Syndrome is a good looking person who lacks confidence or releases they are much hotter than they think and there partner but the partner is aware she has ugly duck syndrome.

Much like the tale of the ugly duck who turned in to a swan.
Wow she is so hot and does not realise it, she has ugly duck syndrome.

Man 1: I met a girl who is hot and she actually like me.
Man 2: She must have Ugly Duck Syndrome (UDS)
by Mr Thinker. November 13, 2013
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A condition where a girl who is considered unattractive by the vast majority of society has found herself in an environment in which she is surrounded by girls considered less attractive than she. The girl then allows this unusual circumstance to affect how she behaves, generally resulting in a less compassionate attitude towards others, as she now considers herself a rare and highly sought after commodity due to her attractiveness relative to the other girls aforementioned.
Jill, usually considered a 4 out of 10, has been treating Jack, usually considered an 8 out of 10, like shit, because she's the most attractive girl at this party. Once she recovers from least ugly girl syndrome, she'll realize how inappropriate she has behaved.
by heysuse April 28, 2009
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Dups, Is short for Dating Ugly People syndrome and is very easy to catch the syndrome by dating ugly people. The only cure is dating a cute or hot girl
Bro, That kid is dating a chicken sandwich he must have dups (dating ugly people syndrome)
by Mr Dups April 11, 2019
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When an ugly ass nigga thinks he's sexy af and can get hoes when in reality he's just some ugly ass nigga. This syndrome affects 90 percent of niggas worldwide and is incurable at the moment. It is deadly and causes millions of dubs by bad bitches per day.
"That nigga matt has ugly ass nigga syndrome"
ugly ass nigga syndrome is affecting niggas worldwide!!!!
by javonakabbc December 11, 2017
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The condition when a seemingly attractive person takes off their clothes to reveal an ugly body.
Steve: That girl Tina is too fine!
John: Naw man, I was just with her the other day, she's got Ugly Naked Body Syndrome.
by john diggity April 1, 2006
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When someone is rather unattractive before a weight loss, face altercation ( example, nose job, jaw realigning,etc...) was not full of themselves before the transformation, but after becoming so called "hot" or attractive and becomes a major bitch and having major changes in personality, etc.. super judgemental to other.
"Heidi totally got a case of "Ugly-Hot Girl Syndrome" when she got her face done. She is a total bitch now and completely full of herself."
by Trex2344 May 8, 2010
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When a paki thinks he's sexy as fuck but in reality they're clapped and get no hoes
That guy Amey thinks he's hot but he actually got ugly ass paki syndrome
by Jeetgarg September 9, 2019
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