Webster's Revised Unabridged Dictionary · 1913

Gulp

Gulp , transitive verb

[Dutch gulpen, compare OD. golpe gulf.]

To swallow eagerly, or in large draughts; to swallow up; to take down at one swallow.
He does not swallow, but he gulps it down. — Cowper
The old man... glibly gulped down the whole narrative. — Fielding
Collocations (1)
To gulp up , to throw up from the stomach; to disgorge.

Gulp , noun

1.
The act of taking a large mouthful; a swallow, or as much as is awallowed at once.
2.
A disgorging. [Colloquial]