Ali Zafar's upcoming film Tere Bin Laden has a song called Ullu da patha sung by him and Shankar Mahadevan.
Ullu da Pattha is a slang which literally means son of an owl but is actually used for someone who does idiotic things. As a matter of fact, Ullu da Pattha is such a common word that it's been used to address people more with love than as an insult.
So when you hear the song he's a good looking Ullu da pattha, don't wonder how the words can be used together. It's friendly here.