gut (Noun) — (high energy physics) a theory which unifies the forces (except gravity) at energy scales ~10^16 GeV.
gut (Noun) — The part of the alimentary canal between the stomach and the anus.
gut (Noun) — A narrow channel or strait.
gut (Noun) — A strong cord made from the intestines of sheep and used in surgery.
gut (Adjective) — Unthinking; prompted by (or as if by) instinct. ex. "a cat's gut aversion to water"
gut (Verb) — Empty completely; destroy the inside of. ex. "Gut the building"
gut (Verb) — Remove the guts of. ex. "gut the sheep"