Wiktionary
flip burgers
vb. (context informal English) To be in a low-paid job, especially one in a fast food restaurant.
Usage examples of "flip burgers".
I think I said something like, how would a high school diploma help me flip burgers?
Allahar point out) are becoming increasingly ghettoized in retail and service sectors, where they endlessly lift and carry, stock shelves, push brooms, bag groceries, and flip burgers, gaining no skills and seeing no path of advancement ahead of them.
I took a job with them because it was either that or flip burgers at McDonald’.