i dinno - When you're too lazy to say I don't know, but you're also to

When you're too lazy to say I don't know, but you're also too dumb to just say it plain

I dinno what to wear because I'm too busy fighting with my brother.

I dinno if I should go to the party or stay home and watch Netflix.

I dinno what I did to make my mom angry, but I know it was something stupid.