Wikipedia
Rameumptom
According to the Book of Mormon, a Rameumptom is a high tower or stand from which the apostate Zoramites gave a pre-determined, vain prayer. The practice of preaching from a Rameumptom was viewed by several Book of Mormon characters (including Alma the Younger and his companions) as sinful.
Based on this passage in the Book of Mormon, the term "Rameumptom" has come to have a metaphoric meaning in Mormon culture, signifying self aggrandizement or hubris.