1. Arpie is an initialization morphed into an acronym. (a retro or redux acronym?) Role Player=RP=arpie. Note the initialization is also contained within the homonym.

2. In complexity theory, RP ("randomized polynomial time") is the complexity class of problems for which a probabilistic Turing machine exists with these properties.

Arpie: Anonymous Role Player Inserting Epiphytics; or
algorithmic randomized polynomial interaction e (2.718282... in geek-speak)
Is that Arpie a Role Player or a Randomized Polynomial? (If the correct answer to the latter is YES, then it returns YES with probability at least ½ (otherwise, it returns NO)
by Recursive Prophet October 14, 2007
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Arpi is so many amazing things.She is the most wonderful person and will become friends with you instantly.She is always trying to make you laugh and smile.She is really shy but once you get to know her you'll be surprised. She doesn't know that she's really beautiful even though she is, oh yes and she's super kind. She would never hurt anyone not even a bitch. She tells you all her secrets the second you meet her. Once she falls for a guy she never stops loving him. Arpi is also really smart but doesn't show it much. She spends her days laughing and smiling and her nights crying. She always picks herself up after she falls, even when no one is there to help her.
"Why is she eating like she just saw Michael Jackson rise from the dead riding in on a wild pig while singing his next hit?" "Oh Arpi"
by Cerealisgr8foryouatnight October 6, 2013
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Arpi is such an amazing person. She's always there for her friends and never a snake. When you get to know her you'll love her. Once you fall in love with her it's almost impossible to stop. Arpi is a very peng girl but she'll never believe it. You should get a friend like Arpi, she'll always cheer you up.
You're so lucky to have Arpi in your life.
by Wysg September 15, 2017
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A beautiful, hot girl who knows everything and is really smart. She can give awesome advice and has a real great personality.
by wondercutie April 3, 2009
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A person who Role-Plays
That geek is an arpie
by Inache August 24, 2003
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A derogatory slur for people from Southern England who speak what they themselves refer to as ‘Received Pronunciation’, a dialect of English that attempts to position itself as the ‘correct’, ‘proper’ or ‘default’ way of speaking Anglo- or British English. The dialect may incorrectly and fallaciously called the ‘Southern’, ‘English’ or ‘British’ accent by outsiders.

It is not to be confused with other terms for southerners, as this term excludes East Angles, Westcountryfolk, Essexfolk, Estuaryfolk, Cockneys, Mockneys, and other non-RP Londoners and Southerners.
Arpy: “Oh, you’re at University? What do you read?”
Non-Arpy: “I read the fucking kebab house menu, you arpy piece of shit.”

Arpy: “I can’t wait for tonight, daddy finally sent the money he promised, so I’m going to live large! What are you doing this evening?”
Non-Arpy: “Scrubbing tables and cleaning toilet bowls because some of us have to work for a living Tarquin, you arpy piece of shit.”
by ReytPropah November 30, 2022
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