gulp in WordNet English dictionary

1. a large and hurried swallow
   "he finished it at a single gulp"
   gulp  draft  draught  swig 
   
2. a spasmodic reflex of the throat made as if in swallowing
   gulp  gulping 
   

1. utter or make a noise, as when swallowing too quickly
   "He gulped for help after choking on a big piece of meat"
   gulp 
   
2. to swallow hurriedly or greedily or in one draught
   "The men gulped down their beers"
   gulp  quaff  swig