rumptious

adjective2

1. •
   (dialect) Energetic, rowdy, uproarious.

   • In the hands of a skillful writer, the South's colorful cast of genteel aristocrats, coquettish belles, devoted mammies, and rumptious hill folk could be enchanting. — 1988
2. •
   (humorous, nonstandard) Of a person's buttocks: large, well-shaped.

   • Inebriated, she didn't feel a thing, thinking she was being pinched and stroked, when he inserted a small needle into her rumptious tush, putting her soundly to sleep. — 2006