1.) A single part of something.

2.) As noted a bathing suit type for women.

3.) More commonly defined here it's an anime show that came from a manga from Japan. It was written by Eichiro Oda out of a love for pirates and especially the pirate Blackbeard. (Oda stated that Blackbeard was his favorite pirate) One Piece is a lot like other anime shows in that because the manga remains ongoing and continuous, the people in charge of the TV show have to keep things interesting and add contents to delay the show's progression.

The show stars Monkey D. Luffy and his pirate band. Luffy, influenced by the notoriously famous red-haired pirate Captain Shanks, decides to set sail for the Grand Line to find One Piece, a treasure hidden by Gol D. Roger before the Navy hung him from the gallows. He builds up a crew consisting of Roronoa Zolo (skilled samurai swordsmen), Nami (expert navigator and petty thief), Sanji (magnificent chef; master of fighting with his feet since he needs his hands clean for cooking), Usopp (long-nosed liar and 2nd in command), Tony Tony Chopper (silly talking reindeer who works as the crew's doctor) & Nico Robin (Assassin Girl who kicks serious ass).

An interesting thing about One Piece is there are no power levels and so most, if not all, of the characters get many significant fights. Besides Luffy's crew various other pirates threaten the seas in their goal to find One Piece or get a huge bounty on their head. (Or Both) The navy also appears and various leaders such as Chaser, Hina and Django hunt Luffy's crew and the other sea raiders down.
1.) May I have one piece of that pie?

2.) ???

3.) One Piece is an anime show where practically all the characters have cool powers and engage in fights often. They all have interesting moves including, but not limited too, creating copies of body parts to slap or punch people from a distance, turning large, slashing a sword so fast that shockwaves emanate from the blade and stretching one's limbs. The show stars the silly but lovable Monkey D. Luffy who's power is possibly the most creative and awesome in the show. He's made of rubber and has some great clashes. The show can be seen on Cartoon Network's Toonami and there is also a game out called One Piece: Grand Battle featuring most of the main characters and villains.
by Jordan Leone Thaler October 7, 2005
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A super special awsome treasure that was hidden by the infamous Gold D. Roger somewhere on the Grand Line. Luffy and his gang go on a search for this Huge amazingness
Johnny Depp: So what are you supposed to be doind Diddy?
P.Diddy: I be watchin my brutha Luffy and his Pirate posse search for One Piece
by Shodakai June 14, 2008
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A never ending anime about a pirate who can’t swim.
grandpa: “hey grandson i used to watch this show called one piece, you heard of it?”

grandson: “of course the new episode just aired yesterday.”
by Kuroneko degenerate June 12, 2021
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Awesome Japanese cartoon (or anime) about pirates. Characters include a carefree rubber man who wants to be pirate king, a ninja who uses three swords at once (holding one in his teeth), etc. Their goal is to get the ultimate treasure, One Piece, and have a butt-load of zany adventures in the process.

It would be so much more awesome if they hadn't let 4kids butcher it horribly.
That One Piece is an awesome anime. Almost as good as Bleach.
by Ander May 30, 2005
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An anime about pirates finding a treasure with episodes that seems that its never ending. You either fall in love with the anime or you absolutely hate it. No in between. IT'S THE BEST ANIME IN THE WORLD IT CAN'T COMPARE TO ANYTHING ELSE.
NPC: "Hey have you heard about that weird series One Piece?"
PC: "Oh you're talking about ONE PEAK????? IT'S NOT WEIRD YOU LONG BACKED ASSHOLE."
by manstabber November 6, 2022
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Another word for 'bible'
Child : Mum?
Child: Can I read the bible?
Mum: You mean One Piece, the greatest manga ever to exist, the new bible?
Child: Yes!
Child reads one piece.
Child: I'm actually onepieceist, the best religion.
Dad: I'm home with the milk!
Monke D Child, Monke D Dad and Monke D Mom lived happily ever after
Onepieceists
by Buop July 17, 2022
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An extremely tight vagina. It is so tight that it seems as if the labia are fused together.
-"Her one piece was so tight, my dick turned blue."
by dghhj July 11, 2008
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