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A girl's version of an e-peen. People also use e-tits. These are slang for a girl's online junk. It's like when a girl shows off her internet body parts like she's flexing her butt in a virtual gym.
My cousin's e-gina is so big, it could power a spaceship.
She posted 12 selfies and called it 'e-gina flexing.'
He said her e-tits were bigger than his e-peen.