can’t do something for toffee
US /kænt du ˈsʌmθɪŋ fɔr ˈtɑfi/
UK /kænt du ˈsʌmθɪŋ fɔr ˈtɑfi/

1.
être nul en, ne rien savoir faire
to be very bad at doing something
:
•
I can't do something for toffee when it comes to cooking.
Je suis nul en cuisine.
•
He can't do something for toffee at playing the guitar.
Il est nul en guitare.