"barf" in the noun sense
1. vomit, vomitus, puke, barf
the matter ejected in vomiting
"barf" in the verb sense
1. vomit, vomit up, purge, cast, sick, cat, be sick, disgorge, regorge, retch, puke, barf, spew, spue, chuck, upchuck, honk, regurgitate, throw up
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"
Source: WordNet® (An amazing lexical database of English)
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