A northern english term used to describe a better decision. It stems back from when a Bradford City football (soccer) game sold out of seats. The commentator joked about how he would use a blimp to see the awesome match continue before his eyes if he did not have a seat. The other commentator laughed and the term soon became frequent in Bradford City chants and other every-day usage.

Got the covid-19 vaccine

A literal example of blue-sky thinking. Choosing an option that is so ridiculous that no one else has thought of it.