(idiomatic) An instantaneous reaction made without thought.

(idiomatic) An instinct or intuition; an immediate or basic feeling or reaction without a logical rationale.

(anatomy) The caecum of the intestines.

Describing a play in American football in which the player runs the ball through the middle of the field through defenders.

(idiomatic) The emotional dimension of decision-making. A person's subjective (often almost visceral) feelings about what is right or wrong, good or bad.

(informal) A beer belly.

(Canada, US, slang) To work or try very hard. / (Canada, US, slang) To develop a pain in the side from laughing hard.

(obsolete) Fine catgut.

A horse's caecum.

plural of gut-bread (alternative form of gutbreads).