to surge or rush back, as liquids, gases, undigested food, etc.

to cause to surge or rush back; vomit.

to give back or repeat, esp. something not fully understood or assimilated

to regurgitate the teacher's lectures on the exam.

verb

be seasick , be sick , boff , drive the bus , dry heave , eject , emit , expel , gag * , heave * , hurl * , lose one’s lunch , pray to the porcelain god , puke * , ralph , retch , spew , spit up , throw up , toss one’s cookies , upchuck , urp