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The cut above or near the eyebrow or upper cheek that an action film star always acquires at some point during the film. Named for the make-up artist who perfected the technique.
It's not really an action movie unless the hero gets a gelli slice above their eye.

I'm so mad, I'm about to give you a genuine gelli slice.
via giphy
by Kelli Bo Belly July 24, 2018
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