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plural overlips
(now uncommon) The upper lip. quotations examples
They seem to her still so young, hardly more than children, really, even Adam—especially Adam—with that babyishly fat overlip that trembles so when he is excited or upset.
2010, John Banville, The Infinities
His eyes were closed, his mouth opened. His breathing, irregular for three, then four, then five breaths, returned to its normal, soundless rhythm. Stubbled overlip and wet underlip moved about some final, silent word: […]
2014, Samuel R. Delany, Tales of Nevèrÿon
(rare, chiefly of a dog) An upper lip that extends too far out and down. (Compare overbite.)