A slang for a "true's love kiss" (mostly a "French kiss") in Anime culture, oftenly used in Yuri (lesbian/girls' love genre) while less common on Yaoi (gay/boys' love) and Straight (common boy & girl romance) genres. It is an analogous, yet synonymous pun on another word, "one peace," in a romantic manner, used to refer the love between two partners is considered as their "invaluable and irreplacable treasure" for peaceful ways. Metaphorically, it is NOT the same as Gol D. Roger's treasure in the anime with the same name, but a personal expression/form of love.
Storyteller: "At last - with a fulfilling kiss of purity sticked between their lips, their priceless treasure - the true love between a tomboy prince and a beautiful princess - is finally found in "one peace." And they lived happily ever after..."

Storyteller's daughter: "So the "One Piece" is real! I wanna marry a girl too when I grow up!"
by Pirate King of Yuri July 24, 2023
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MELLORIIINE
Sanji: NAWI-SWAAAN, ROBIN-CHUWAAN MELLORINEEEEE

Zoro: Shut the fuck up retard cook, we need to find the One Piece
by Shqdy June 21, 2021
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guy 1. did u watch peak
guy 2 yes i watched one piece
by July 10, 2023
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It's not real.

I need you to lower it down.

Please stop sending me dick pics.
THE ONE PIECE! THE ONE PIECE IS FAKE!
by PLAYERLXIV September 3, 2022
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Term used in Lacrosse.
To check (hit) someone's stick so hard, the player accidentally drops his Crosse (stick).
Man, Matt just go One pieced by that defender.
by Thad Badassle April 1, 2011
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Player 1: Why is there a green defender Big Mom on the enemy team?
Player 2: ...Welcome to One Piece Bounty Rush
by Tjeutch. January 15, 2023
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