The term 'casual toss' can be described as a 'FLING, ' which is a five-letter word. A casual toss is an informal, lighthearted throw of an object, usually done for fun or amusement. It is often done in a playful manner and does not require any particular skill or technique. It is a common activity among friends and family, and can be used to pass time or to add a bit of excitement to a gathering.