a coined term meaning to feel good afterauditing and then feel bad; have a slump after a gain. A "rolly coaster" case is one that betters and worsens; the person goes up and he goes down and he goes up and he goes down. From roller coaster, a railway for amusement consisting of inclined tracks along which small cars roll, abruptly dip, turn, etc. —ExDn Lectures Approved Glossary: Expanded Dianetics (30 March 1972)