Hot Girl Summer was popularized in 2019 by rapper Megan Thee Stallion, quickly evolving from a song title into a massive cultural movement and internet meme. It describes a period where individuals embrace self-love, authenticity, and confidence while having fun with friends, regardless of relationship status. The meme template is widely used on social media to showcase lifestyle upgrades, vacation photos, or humorous expectation vs. reality situations during the warmer months. It represents a shift towards body positivity and unapologetic enjoyment of life, making it a perennial favorite every time the sun comes out.