blot one's copy book
/blɒt wʌnz ˈkɒpi bʊk/
To make a serious mistake or error.
“Tom blotted his copy book with that big mistake.”Add to my deck
inoh
inoh
/blɒt wʌnz ˈkɒpi bʊk/
To make a serious mistake or error.
“Tom blotted his copy book with that big mistake.”Add to my deck