1
general::
Also, make hamburger of. Thrash, beat decisively, as in That bully will make mincemeat of my son, or The other team will make hamburger out of us. This idiom alludes to finely chopping up meat. The first term dates from about 1700, the variant from the first half of the 1900s.
American Heritage Idioms
2
general::
Phrase(s): make mincemeat (out) of someone [and] make hamburger (out) of someone
Fig. to beat or pound someone or something; to treat someone or something roughly. (As if chopping someone up.) • If you don’t behave, I’ll make mincemeat out of you. • Do you want Fred to make hamburger out of you?
McGrawhill's American Idioms And Phrasal Verbs