I'm thinking of borrowing my father's credit card when he is not looking.
Stealing your father's credit card is wrong.
I don't care, I just want to get a new pair of jeans
Using your father's card without his permission is wrong. It is basically stealing from your father.
Nah. He won't notice
If he notices and cancels the card, you won't be able to use it. Even if that doesn't happen, when he sees the charge on his statement he will be mad. You could just ask for some money instead.