subdermatoglyphic

The longest word in the English language that doesn't use any letters twice.

Phil: "Hey man, did you know 'subdermatoglyphic' is the longest word in the English language that doesn't use any letters twice"
Matt: "Get a life, nerd"

Subdermatoglyphic

pertaining to the layer of skin beneath the fingertips

you're subdermatoglyphic must be remove by nail/cuticle remover

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