fansplain
When a fan tries to explain something to a pro athlete, coach, GM or entertainer about the pro's craft. Takeoff of mansplain.
(fan) "If you open your batting stance, you'll see the ball better."
(pro athlete) "Don't fansplain! I'm the pro athlete, not you!"
(pro athlete) "Don't fansplain! I'm the pro athlete, not you!"
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