From Wikipedia:
Posi music (pronounced pah-zee) has been around since the 1940s, though only recently has a definitive label been applied to music in this genre. Short for Positive Music, Posi Music is categorized by its intention to have a positive effect on the listener. Musicians who write and perform Posi Music profess a desire for their music to unite and inspire their audience and make them feel better. One of the earliest 100% Positive Songs was Accentuate The Positive written by Johnny Mercer and made famous by Bing Crosby. That same song also defined the concept that there is indeed polarity between being Positive or being Negative, specifically noting there is also no Neutral as in "no more Mr. In-Between".

This concept has been expanded by groups promoting the education of Posi Music, such as the Positive Music Association, emPower Music and Arts and the Positive Music Imperative. This concept of Positive Music and Negative music has also been identified in the book called A New Earth, by Eckhart Tolle
Song Examples from the Posi Music Genre:
"Change The World" by Bone Thugs-N-Harmony
"We Shall Overcome" by Pete Seger
"If I Had A Hammer" by Peter Paul & Mary
"You've Got A Friend" by James Taylor
"Bridge Over Troubled Water" by Simon & Garfunkel
"Thank You For Being A Friend" by Andrew Gold
"Thanks for the Memory by Bob Hope
"Thank You" by Dido or Natalie Merchant
"There's Hope" by India.Arie
"I Gotta Feeling" by The Black Eyed Peas
by JakPen June 9, 2013
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boys basketball shorts worn by bros who go to hardcore shows.
"yo did you see those posi gym shorts the kid in the pit is wearing?"
by The Xs Are Silent June 10, 2008
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A sub-genre of Post-hardcore/Metalcore music that has songs contain mostly postive lyrics. (About life, love, etc.)
by IanCore August 16, 2011
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This iconic quote was said by BLACKPINK's Jennie to member Rosé, basically a cute inside joke among the BLINK fandom.
Rosé: *spills water*
Jennie: Oh no Rosie Posie did it again
by Clary Maria💌 November 15, 2021
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The law of one eating bagels to make their butt bigger
“How is your booty so big?” “I followed Posie's Law.”
by wimmie_g May 8, 2023
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Posi Mob is a group that protect PRPWOE. Positive group who respect women but they still go by "Money over Bitches".
Hey thanks for joining Posi Mob.
by TYBG4EVA June 1, 2019
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Slang for "body positivity" usually used in captions to indicate that the post is promoting self-love . Can be used for motivational texts/pictures about body image or just a photo of someone showing their body in a positive way so that people with the same body type can relate and know they're not alone.
Twitter caption followed by a picture of someone : "I am still learning how to love my body and unlearn all the negative ideas that are deeply rooted in my mind . So here's a picture of my *conventionally ugly* body. #bodyposi"
A motivational post's caption : "Here's some body posi for those of you who have body image issues "
by surejan January 30, 2017
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