I feel pretty, oh so pretty, exhausted.

It has been a dull and rainy day but I have done so much that I feel as light as a feather, oh, that's due to exhaustion. I have achieved a lot and I've cycled another eight miles. I walked about the same yesterday, I am shaping myself up to be fit as possible before I leave for Brazil as my band are going to be young men full of spark and spunk and I need to be able to keep up. Got my travel insurance sorted, so that was another box ticked. I keep using my app to learn a little Portuguese but it keeps telling me I am a dullard.

Wonder what dullard is in Portuguese (Brazil colloquial mind)?