RichThesaurus
bust a nut
vs
bust one's butt
bust a nut
verb
To work very hard; to put in a lot of effort.
To ejaculate.
bust one's butt
verb
To work exceptionally hard.
How often have the words
bust a nut
and
bust one's butt
occurred in a corpus of books?
(source:
Google Ngram Viewer
)