WordNet (r) 3.0 (2006):
spit up v 1: give reluctantly; "He coughed up some money for his children's tuition" [syn: cough up, pony up, spit up] 2: discharge (phlegm or sputum) from the lungs and out of the mouth [syn: expectorate, cough up, cough out, spit up, spit out]