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To get worked up, excited, or increasingly fervent about something.
"wow, I'm getting really upsy as I'm watching these seeds grow!"

"I get really upsy when I disagree with dumb AP Lang bullshit. "
by Ogmud May 16, 2015
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When a man or other woman looks up a woman’s skirt or pants
Will you give me upsies
by Boris the tank lord May 18, 2018
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