The term 'ROLLER COASTER RIDER'S CRY' can be summarized as the exclamation of joy and excitement that a roller coaster rider typically makes while riding a roller coaster. The crossword solution for this term is WHEE, which is an expression of joy and excitement. Roller coasters are amusement park rides that feature steep drops, sharp turns, and other thrilling elements. Riders often scream with delight as they experience the thrill of the ride.