throw (something) upinformal
I think I'm gonna barf.
Some children tell us that they eat until they start to barf.
All I know about babies is that they cry, barf, and poop a lot.

SMART Vocabulary: related words and phrases

Vomiting & feelings of sickness
airsickness
bring
bring someone up
carsick
carsickness
chunder
dry heave
morning sickness
nauseatingly
puke
retch
seasickness
sick something up
sick to your stomachidiom
sick-making
sickeningly
spew
travel sickness
vomit
woozy