Идиомы
not know the first thing about (someone or something)
Значение английской идиомы not know the first thing about (someone or something), пример звучания и использования.
–не иметь ни малейшего представления о чём-либо
Использование not know the first thing about (someone or something):
Hillary did not know the first thing about computers, so she asked her friend to fix it.