When u start singing sogekings theme song in the middle of town
When you randomly quote characters.
when you can list all the straw hats and their ages
When you know what all the Strawhats smell like.
when you say "people's dreams…will never end!" to cheer someone up
when you practice franky's dance moves
When you answer the phone and say "this is the Shit-restaurant... would you like to make a reservation?"
when you dream of humping one of the male strawhats, perfecrtly normal if robin,or boa, etc.
When you hum or sing one piece songs
when someone seys naruto is better then one piece and u list millions of reasons why its not
When you hear that a celebrity died on the news, you say "a man dies only when he's forgotten".
When you pose and yell "SUUUUUPEEEEER!!!" in public and don't care that people are staring at you.
When you find yourself unintentionally imitating Luffy's voice while saying things such as "Nani?" "KAIZOKU DAN" "MEIJIIIIII" etc
When you skip around town screaming mellorine.
When you laugh "Derishshshsh", whenever you are sad or having a bad day.
When you can think of all of your favourite pairing's moments.
When you have a schedule that is wrapped around One Piece.
When you say "Mellorine" to attractive girls and add "swan" or "chwan" to their names.
When you wave your hand in front of your face as you dismiss something, and only later realise how dumb you look
When more often than not you start singing/humming Binks' Sake in public places...
When you imitate some of the characters laughs
the sounds of one piece constantly play in your head
When you give advice to people that is more or less directly from one piece
When every time you meet a Japanese person you can’t help but ask them if they watch one piece
When you randomly overhear a conversation about one piece (not that it happens often) and you feel compelled to introduce yourself to the people
^^^ I am guilty of ALL of these and most of them on a regular basis to boot (in addition to the ones I posted)