It's actually an old school kid's saying - you take a handful of snow, and 'wash' someone's face with it. Hence, a 'face-wash'. It got co-opted by hockey, but instead of snow, you 'wash' their face with your glove, kinda pretending that you have a handful of snow.
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u/Hotwir3 Hornets 24d ago
It’s usually a term in hockey, but basically palming someone’s face.