Peristalsis

[Vania]

Rhythmic [visceral] muscle contractions in the [digestive system] that function to transport ingested materials caudally, unless stimulated by the emesis [reflex] where the flow of digested material is reversed.

[Couch Potatoe]

The involuntary constriction and relaxation of the muscles of the intestine or another canal, creating wave-like movements that push the contents of the canal forward.

[Becky]

the repeated movements made by the muscle walls in the digestive tract tightening and then relaxing that push food and waste through the body