From Longman Dictionary of Contemporary Englishthrow up phrasal verb1 SICK/VOMITto bring food or drink up from your stomach out through your mouth because you are ill SYN vomit Georgia was bent over the basin, throwing up.2 throw something ↔ up British English to produce problems, ideas, results etc The arrangement may throw up problems in other areas.3 throw something ↔ up if a vehicle, runner etc throws up dust, water etc as they move along, they make it rise into the air4 throw something ↔ up British English informal to suddenly leave your job, your home etc I can’t just throw everything up and come and live with you.5 throw something ↔ up British English to build something quickly new houses hastily thrown up by developers → throw→ See Verb table
Examples from the Corpus
throw up• I tried giving him some cool, boiled water, but he even threw that up.• Just thinking about it makes me want to throw up.• Keith's had a particularly nasty form of the illness - he's even been throwing up with it. 