A Mary Sue is a seemingly perfect character. Their male counterpart is a Gary Sue or a Marty Sue. They have little to no flaws. Often times they have a tragic backstory, being abused, abandoned, etc. They are unrealistically attractive, and often times have things that break cannon severely, such as a Pokémon girl being a Neko. They often have powers that are given to no others in the universe, and that have nothing to do with the universe. They often have long names, often times having 'Kawaii' or 'Desu' or simple Japanese language within them.
Often times they are dating a cannon character, and often times replace a cannon character.
"Your OC is a Mary Sue!"

"Yeah, my old OC was named Shi. She was a Mary Sue."

"Here's my OC, Kristina Jose Marky Trinity. Please don't say she's a Mary Sue."
by glibmonster July 16, 2017
Get the Mary Sue mug.
A sexist term used to enforce the misogynistic ideals that female characters/authors shouldn't be allowed to fantasize or write anything along the lines of wish fulfillment. Its misogynistic qualities are exemplified in many ways, most notably being the fact that it's not a term dominated by the male counterpart despite existing in a patriarchal society, as well as the fact that the male counterpart is largely undecided upon in name and also undefined (see urban dictionary's Gary Stu entry which has no definition but to say "A Male Mary Sue", and the Marty-Stu entry which involves the "Mary Sue" definition to define it).

It's usually used on the whole to bully new authors out of writing female characters altogether, making the task seem so daunting to some that they now only write slash fictions with two male characters, also exemplifying the misogynistic qualities this term involves.
1.

Fan Fiction Reader: Why don't we just call all bad/annoying characters "special snowflakes" instead of using a female name like mary-sue in a derogatory fashion?

2.

Troll: You're writing a mary-sue to pair with the canon character you fat low life, it's pathetic and so are you!

3.

Author: I'm so afraid of having my female character labeled as a mary-sue that I only write male characters!
by urmamason May 21, 2013
Get the Mary-Sue mug.
A Mary Sue is often a perfect female character, with no flaws, a sad backstory, and the story often revolves around them. They often have impossible bloodlines and names like Ebony Dark'ness Dementia Raven Way and they completely upstage canon characters. The other characters are also commonly friends with or in love/crushing on the her, despite not having any reason to.The male counterparts are Gary or Marty Sue.
"Ebony's name is Enoby not Mary Sue"
my immortal
by Blue Flaming Wolf February 23, 2019
Get the Mary Sue mug.
An OC (Original Character) that is basically the best in every way possible. Usually they have a disproportionately large chest, rainbow hair and a dark backstory. They usually have names like, 'Princess Rainbow Sparkle Killer Kawaii Desu' or, 'Miss Sexy Thang Sparkle Rainbow Queen Psycho Killer Shiny Beauty Girl'.
That biatch is nothing but a careless, insincere Mary Sue!

~or~
My eyes are bleeding, and critique would do an indescribably large number on this, I think it's a Mary Sue!
by YeeBlaster June 29, 2018
Get the Mary Sue mug.
A term used by emotionally stunted men in fandom spaces that are either:
1. Threatened by a powerful female character, (but, not a male character with the exact same arc)
2. Unable to comprehend the heroine arc or emotional depth and struggle that character has had to go through
'Rey is such a Mary Sue'-Jack Dimwit exclaimed, in disgust that a character could probably beat him up, *with no training*, even though the character literally grew up having to learn how to defend and feed herself since she was 5 years old
by usethehorserey April 30, 2019
Get the Mary Sue mug.
A term referring to a character in fiction who is unreasonably favored by the author. The character typically faces few conflicts between themselves or non-villain characters, displays a complete lack of seriously crippling flaws and weaknesses, and has their bad actions repeatedly forgiven or regarded as unquestionably good by the story.

That is of course what the term is supposed to mean, but over the years its use has become more and more broad and haphazardly thrown around that it has essentially lost all meaning. Characters who obviously aren't Mary Sues are frequently called them, while characters who clearly fit the description fly under the radar. Mary Sue has become just another meaningless term used as a covert synonym for something you don't like, the same way "unfair" is used for video games or "contrived" is used for movies.
Kid: "Have you seen the new movie that came out? The main character is such a Mary Sue."
Kid 2: "No she's not. Do you even know what that term means?"
Get the Mary Sue mug.
Me
You: what a bitch
Mary Sue bc I can’t post without saying it
by ( ͝° ͜ʖ͡°)ᕤ May 8, 2022
Get the Mary sue mug.