noun / verb
barf
BARF/bˈɑrf/
Stomach contents brought up through the mouth, or the act of bringing them up.
The woman barfs into a bucket.

Etymology
Barf is American English slang for vomiting or retching, probably formed in imitation of the sound. The evidence supplies no older word behind it.
In context
the grossest thing I can think of that I learned from my time there is hemisected penis, cut in half. It just, ugh, it just still makes me wanna barf.