Mary Sue page:

There are some people who have no clue what a Mary Sue is.  Lucky them. A Mary Sue is hard to define, there are lots of types out there, but when you see one, you know it's her because she's too perfect, too contrived, and too liked to be a real character.  To help, here's some definitions:

MARY SUE:  This is an all-encompassing word to define any incarnations she may have.  Mary Sue is like those machines you see on sale at Walgreens (or whatever bargain place you shop at).  She's got loads of extras, but she doesn't really DO anything.  She's the smartest, the prettiest, the most modest, the best at anything there is.  But what does she do?  She just stands there while the story has everyone out of character.  The Hero is turned into cardboard and drools over her, and rescues her nonstop.  Sometimes more than one guy likes her and they all fight over her.  The heroes girlfriend is not a skank, a whore, something awful and evil, someone who doesn't deserve the Hero.  everyone else is there just to compliment Mary Sue, or insult her so she can prove she's better than them and then they all bow to her and her Mary Sue skills.  Mary Sues often have a bad abusive past, so the readers will pity everything about her.  She's the most beautiful person ever, so even the reader falls in love with her.  She's really just a jerk, acting condescending to everyone because they aren't as perfect and are flawed.  With all her tricks, she has no real personality.  It's all smoke and mirrors and nothing's really there.

MURRAY SUE: Same thing as Mary Sue, but male.  He's the sexiest, smartest, perfectest guy in the world. Women swoon over him.  Etc.  Also known as Marty Sue, Gary Stu, or Wesley. 

BOBBY SUE: Your usual Mary Sue, but more masculine.  Instead of a beautiful dress, she has amazing pants (no girly Mary sue wears pants unless she has to.)  She's a warrior or a mechanic.  She does 'guy stuff'.  Often times she looks liek a guy, despite the ffact that she looks like she's smuggling watermelons in her shirt.  And yet, she doesn't get dirty.  She refuses to get dirty.  She has to wer clean clothes at the shop, she like frogs, but won't hold them becuase they're icky.  She is, in reality, a wuss

TRIXIE SUE: Mary Sue's evil rival who tries to steal her boyfriend(s) by flirting with them and having sex and being overall, and enjoyable person who has hormones. Trixie has a real personality, but it's all lies. A gift?  An attempt to steal her boyfriend.  She doesn't mean it!  Acting nice?  All an act!  Mary Sue always gets her boy(s) back by being perfect and innocent, so don't worry.

EVIL SUE: The villain Mary Sue has to defeat/get rescued from.  He's so over-the-top evil, he was too good for looney tunes.  Everything about him is exaggerated until he's not human, he's cardbaord and a gag.