bust one's hump

bust one's hump (third-person singular simple present busts one's hump, present participle busting one's hump, simple past and past participle busted one's hump or bust one's hump)

1. (Canada, US, slang) To work very hard; to put in strenuous effort.
   • 2005, Jacey Eckhart, The Homefront Club:

     That poor guy is already busting his hump, learning his job, working sixteen or eighteen hours a day for some fruitloop who throws pens when he gets mad.