One of the main characters in the anime/manga series "Naruto". When he was younger, he witnessed the murder of his entire clan at the hand of his sexy older brother, Itachi Uchiha. As a result he is very angsty and emotionally unstable, and desires revenge on his older brother at all costs. His teammates are Naruto Uzumaki (his best friend/rival/gay lover), Sakura Haruno (his good friend, who has a crush on him, unaware of his gayness), and Kakashi Hatake (his sensei/teacher/father figure).
Just as Naruto starts to work his way into Sasuke's heart, Orochimaru (the son of Lord Voldemort and Michael Jackson), who desires the bloodline limit of the Uchiha clan (the Sharingan), approaches Sasuke during the Chuunin exams and gives him a hickey--er, Cursed Seal to give him a taste of power and put him back on the path of revenge. As a result, later in the series Sasuke joins Orochimaru, who begins to train/molest him, so he can become strong enough to kill Itachi.
Despite what rabid fangirls wish to believe, there is no evidence that Sasuke is heterosexual. Quite the opposite, actually. Sasuke shows no interest in females, despite having legions of fangirls within the series who he could easily get into bed if he desired. Fangirls like to use the "I want to restore my clan" line as proof that Sasuke is straight, despite the fact that "restore my clan" is a very vague phrase and Sasuke has done nothing to back up his words (IF restore clan = make babies).
Nearly everyone in the Naruto fandom hates Sasuke for being "an emo fag" and betraying his friends, and apparently they don't care that Sasuke went through overwhelming trauma as a child and is probably borderline insane. This just shows that the majority of the Naruto fandom are heartless bastards who hate what they don't understand. There are other reasons people hate Sasuke, but they're all stupid so it's pointless to state them here.
This definition will have 1748354793141571894751341 thumbs down from Sasuke haters.
Person 1: Sasuke Uchiha is such an emo fag!!1 If I were him I'd NEVER EVER EVER betray my friends!!1 And I wouldn't be so EMO if my bro killed my parents!!1 Blahblahblah sasuke sux blahblah emo crybaby blaahblahblah killed Deidei-kun-chan-sama blahblahblah fag blah blah *WHINE BITCH WHINE BITCH* *IS A HYPOCRITE*
Person 2: ...Wow. You're the most immature, whiny emo crybaby bitch I've ever met. You clearly don't understand Sasuke Uchiha. :|
The most overrated character in the anime/manga series "Naruto". He says "un" a lot, is a drama queen, and looks like a girl. Oh, and he blows things up. And he has mouths on his hands and chest and God knows where else. How smexy.
Deidara fangirls all hate Sasuke because he was there when Deidara blew himself up. They just can't get over the fact that Deidara is a suicide bomber.
Fangirl: ZOMG DEIDEI-KUN-CHAN-SAMA IS SOOOOO KAWAII DESU DESU!!1 i wub him <333
Normal person: ...His name is DEIDARA.