We found 8 dictionaries that define the word bust ass:

General (3 matching dictionaries)

1. bust ass: Wiktionary
2. bust (one's) ass, bust ass: Dictionary.com
3. bust ass: TheFreeDictionary.com

Computing (1 matching dictionary)

4. bust ass: Encyclopedia

Medicine (1 matching dictionary)

5. bust ass: Medical dictionary

Miscellaneous (1 matching dictionary)

6. bust ass: Idioms

Slang (2 matching dictionaries)

7. bust ass: Green’s Dictionary of Slang
8. bust-ass, bust ass: Urban Dictionary

Definitions from Wiktionary (bust ass) ▸ verb:  (idiomatic, mildly vulgar) To work hard, especially when trying to achieve a goal. ▸ verb:  (idiomatic, vulgar) To fart. Similar: bust one's ass, bust a nut, bust one's butt, bust someone's ass, bust one's chops, work one's fingers to the bone, bust a gut, get one's ass in gear, burn the candle at both ends, sweat one's guts out, more... Phrases: bust one's ass, bust ones ass, bust someone's ass, more... ▸ Words similar to bust ass ▸ Usage examples for bust ass ▸ Idioms related to bust ass ▸ Wikipedia articles (New!) ▸ Words that often appear near bust ass ▸ Rhymes of bust ass ▸ Invented words related to bust ass