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spit something up
Euph. to vomit something. she almost spit her dinner up. Sally was afraid she was going to spit up her dinner.
Euph. to vomit. The food was so bad, she was afraid she would spit up. Mommy, I have to spit up!
Vomit, as in Infants often spit up part of their milk.
1. To spit something out of the mouth: The boxer is spitting up blood.
2. To vomit something. Used chiefly of an infant: The child is still hungry because he spit his meal up. The baby spit up on her bib.