swallowing

The action of pushing a substance or object from the mouth, down the esophagus, to the stomach.

Usually this is shown with the character's throat undulating/flexing with the swallowing motion, oftentimes, the character's throat is shown bulging with the swallowed substance, object, or creature. Outside of consuming something, swallowing may indicate nervousness, swallowing excess saliva. In drawings, swallowing is often accompanied by the onomatopoeia "gulp" — or similar sound effects like "ulp" or "glk".

Commonly seen in images involving oral sex, stuffing, and obviously a key part of oral vore.