can't do something for toffee
can't (do something) for toffee
slang Is totally unable to do something. Primarily heard in UK. Oh, you'll definitely beat Sarah for that role in the musical—she's can't sing for toffee.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
can't do something for toffeeBRITISH, INFORMAL
If someone can't do something for toffee, they are very bad at doing that thing. Within a step or two it was clear she couldn't dance for toffee.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
can’t do something for ˈtoffee(old-fashioned, British English, informal) if somebody can’t do something for toffee, they are very bad at doing it: He can’t dance for toffee!
Farlex Partner Idioms Dictionary © Farlex 2017