unass

un- +‎ ass

unass (third-person singular simple present unasses, present participle unassing, simple past and past participle unassed)

1. (US military slang, transitive) To get out of (a vehicle or building).
   • 2005, Herman Flora, Miz Suzie's Boy, page 248:

     We “unassed” the barracks and slept outside on the lawn the remainder of the night.

• Ansus, NUSAS, Susan, nasus, sauns