2 definitions by picka sadbadmadhead dookie :(

a comedic style in which a person, usually a 12-15 y.o. male, says or does something incredibly offensive and crass with their main intentions being to overcome their woefully bland sense of humor, make themselves appear intellectual, and offend others. edge is most commonly employed by young teens who haven't quite yet developed a personality and have browsed through a few too many unsavory subreddits.

edge is not the same as dark humor, in which the offensive statements are made with an actual punchline or crux of the joke. edge is typically pointless, interchangeable rambling.
14 year old: "hitler! slavery! cbt! arson!"
normal person: "is this joke going to get a punchline or is it just a bunch of meaningless edge?"
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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?"
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