We found 25 dictionaries that define the word slip up:

General (21 matching dictionaries)

1. slip up: Longman Dictionary of Contemporary English
2. slip up: Merriam-Webster
3. slip-up, slip up: Oxford Learner's Dictionaries
4. slip-up: American Heritage Dictionary of the English Language
5. slip-up, slip-up, slip up: Collins English Dictionary
6. slip-up, slip up: Vocabulary.com
7. Slip-Up, slip-up: Wordnik
8. slip-up, slip up: Cambridge Advanced Learner's Dictionary
9. slip-up, slip up: Wiktionary
10. slip-up: Webster's New World College Dictionary, 4th Ed.
11. slip-up: The Wordsmyth English Dictionary-Thesaurus
12. slip-up: Infoplease Dictionary
13. slip-up, slip up: Dictionary.com
14. slip-up: Cambridge Essential American English Dictionary
15. slip-up, slip up: Rhymezone
16. slip up: Phrasal Verb Page
17. slip-up, slip up: FreeDictionary.org
18. slip-up, slip up: Mnemonic Dictionary
19. slip-up, slip up: TheFreeDictionary.com

Business (1 matching dictionary)

20. slip-up: Legal dictionary

Computing (1 matching dictionary)

21. slip-up: Encyclopedia

Miscellaneous (1 matching dictionary)

22. slip-up, slip up: Idioms

Slang (1 matching dictionary)

23. slip up: Urban Dictionary

(Note: See slip_ups as well.)

Definitions from Wiktionary (slip up) ▸ verb:  (idiomatic) To err, falter; to make a mistake, especially a seemingly small error. ▸ verb:  To lose ones footing; to slip. Similar: stumble, trip up, blunder, slip, misstep, oops, mess up, lapse, fault, goof up, more... Types: Freudian slip, slip of the tongue, slip of the pen, more... Adjectives: flat out, prostrate, ruinate, fallen, chopfallen, trip, sneak, wax, fleet, ebb, belly-up ▸ Words similar to slip up ▸ Usage examples for slip up ▸ Idioms related to slip up ▸ Wikipedia articles (New!) ▸ Words that often appear near slip up ▸ Rhymes of slip up ▸ Invented words related to slip up