I don't know anything about it
When it comes to manual work, I don't know the first thing about it.
— Cléo from 5 to 7 (1962)
Peace? I don't know anything about that.
— Star Trek : Sans limites (2016)
I don't know anything about it.
I know nothing about art.
Je n'y connais rien en armes à feu.
I don't know anything about firearms.
Monsieur, je n'y connais rien en voitures.
Sir, I don't know anything about cars.
— Troupe d'Élite (2007)
Je n'y connais rien en économie.
I don't know anything about economics.
Je n'y connais rien en musique.
I don't know anything about music.