We found 17 dictionaries that define the word spit up:

General (13 matching dictionaries)

1. spit up: Longman Dictionary of Contemporary English
2. spit-up, spit up: Merriam-Webster
3. spit up: Oxford Learner's Dictionaries
4. spit up: Vocabulary.com
5. spit-up: Wordnik
6. spit-up, spit up: Wiktionary
7. spit up: Dictionary.com
8. spit up: Rhymezone
9. spit up: FreeDictionary.org
10. spit up: Mnemonic Dictionary
11. spit up: TheFreeDictionary.com

Computing (1 matching dictionary)

12. spit up: Encyclopedia

Medicine (1 matching dictionary)

13. spit-up: Medical dictionary

Miscellaneous (1 matching dictionary)

14. spit up: Idioms

Slang (1 matching dictionary)

15. spit up: Urban Dictionary

Definitions from Wiktionary (spit up) ▸ verb:  (transitive and intransitive, especially of children) To regurgitate or vomit. Similar: cough up, expectorate, pony up, cough out, vomit, regurgitate, spew up, spew, throw up, vomit up, more... Opposite: swallow, ingest, consume, retain ▸ Words similar to spit up ▸ Usage examples for spit up ▸ Idioms related to spit up ▸ Wikipedia articles (New!) ▸ Words that often appear near spit up ▸ Rhymes of spit up ▸ Invented words related to spit up