The term 'WHAT A TRIP!' can be solved by the crossword solution 'ODYSSEY'. The term 'ODYSSEY' is derived from Homer's epic poem of the same name, which tells the story of the hero Odysseus and his long journey home after the Trojan War. It has come to mean any long and eventful journey, and is often used to express amazement or surprise at the length and difficulty of a particular journey. Therefore, the phrase 'WHAT A TRIP!' is an expression of amazement at the length and difficulty of a particular journey.