The term 'Expression of Excitement' can be expressed in two ways: YIPPEE (6 letters) and Ooh (3 letters). YIPPEE is an exclamation of joy or excitement, usually used to express enthusiasm or approval. It is derived from the English phrase 'yip-pee-aye, ' which was first recorded in the late 1800s. Ooh is an expression of surprise or admiration, often used to show appreciation or admiration for something. It is also used to express pleasure or delight. Both expressions are commonly used to express excitement or joy.