keister /kēˈstər/ (US sl)

1. The buttocks, arse
2. A safe or strong-box
3. A case or box

• underwires
• underwiring
• underwirings
• underwit
• underwits
• underwood
• underwoods
• underwork
• underworked
• underworker
• underworkers
• underworking
• under-workman
• under-workmen
• underworks
• underworld
• underworlds
• underwrite
• underwriter
• underwriters
• underwrites
• underwriting
• underwritings
• underwritten
• underwrote