phrasal
1. : to leave one's military unit without authorization
the boys would go over the hill their first shore leave — Frederic Wakeman
2. : to disappear without warning or explanation
has gone over the hill with the ministry's payroll — Time
phrasal
1. : to leave one's military unit without authorization
the boys would go over the hill their first shore leave — Frederic Wakeman
2. : to disappear without warning or explanation
has gone over the hill with the ministry's payroll — Time
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012