Definition of not know the first thing about in US English:

not know the first thing about

phrase

  • Have not the slightest idea about (something).

    • ‘You know a year ago you didn't know the first thing about soccer.’
    • ‘It seems to me you don't know the first thing about birds.’
    • ‘I didn't know the first thing about dancing, and I think Julius was equally uneducated.’
    • ‘Most kids his age don't know the first thing about politics.’
    • ‘I don't know the first thing about delivering a baby.’
    • ‘I don't know the first thing about designer clothes.’
    • ‘I don't know the first thing about firearms; I have never even held a gun.’
    • ‘Would you buy a BMW from a sales person who didn't know the first thing about the car?’
    • ‘But even so, she didn't know the first thing about first aid and had no way of helping him with the injury.’
    • ‘That was easy for me - I don't know the first thing about football.’