Nahaa
You say 'Nahaa' when you're wrong and you're too stubborn to back down. It's like you're saying 'I'm wrong, but I won't let you win.'
Nahaa, I didn't lie. I just added a few extra details.
Nahaa, I didn't blame you. I just took the blame and ran with it.
Nahaa, I didn't leave. I just took a vacation.