A joke between two cunts. An autumn girl is a beutiful girl that a boy is in love with in the autumn.
Person 1:"Damn, shes my autumn girl"
Person 2:"What are you fucking gay?"
Person 3:"She's HOT!!!"
by MR. TAAACO June 4, 2017
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When a group of girls is so over the summer heat and can’t wait for it to be pumpkin spice latte drinking, sweater wearing, church going, leggings season.
Girl 1: “OMG it is SO hot outside, I literally can’t even.”

Girl 2: “OMG I know. I can’t wait for it to be sweater season, I’m ready for a Christian Girl Autumn.”
by hotboysummer August 25, 2019
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An alternative to No Simp September, where instead of Not Simping, you celebrate cute autistic girls.
Guy 1 "Wow, I love Fiona, she dances so awkwardly"
Guy 2: "What are you doing dude. it's No Simp September."
Guy 1: "No, it's Autistic Girl Autumn."
by Autism is My SuperPower September 9, 2021
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A spinoff of Megan Thee Stallion’s “Hot girl summer”, a meme grew in popularity consisting of a “stereotypical white Christian girl” doing classic autumnal white girl instagram poses and the phrase became a formally established meme.
Christian girl autumn is just being a stereotypical white female in the fall months
by Christian Girl Autumn May 20, 2023
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