vomit up
     v : eject the contents of the stomach through the mouth; "After
         drinking too much, the students vomited"; "He purged
         continuously"; "The patient regurgitated the food we gave
         him last night" [syn: {vomit}, {purge}, {cast}, {sick}, {cat},
          {be sick}, {disgorge}, {regorge}, {retch}, {puke}, {barf},
          {spew}, {spue}, {chuck}, {upchuck}, {honk}, {regurgitate},
          {throw up}] [ant: {keep down}]
Source: WordNet® 2.0