What is the meaning of gulp?

noun

• A large and hurried swallow.
  • usage: "he finished it at a single gulp"
  • synonyms: draft, draught, swig
• A spasmodic reflex of the throat made as if in swallowing.
  • synonyms: gulping

verb

• To swallow hurriedly or greedily or in one draught.
  • usage: "The men gulped down their beers"
  • synonyms: quaff, swig
• Utter or make a noise, as when swallowing too quickly.
  • usage: "He gulped for help after choking on a big piece of meat"