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A gaga hand is when your hands turn into claw-like monsters without you knowing. It’s like your brain is possessed by Lady Gaga and you can’t help it.
My math teacher took a photo of me during a test, and I had a gaga hand. I looked like a monster.
My mom caught me making a gaga hand while eating cereal. She said I was embarrassing the family.
I got a gaga hand in the middle of a Zoom call. My boss was confused, but my friends laughed.