plural keisters also keesters
Definition of keister
informal
: buttocks, rear end sense 2
… Borg took a spectacular dive, landing on his keister.— Curry Kirkpatrick Four hours ago I was freezing my keister in the wilderness. Now I'm browsing the entrees in a French-inspired restaurant.— Andrew Nelson "… a very easygoing guy with a finely honed intelligence, which I didn't realize until he whipped my keister in Trivial Pursuit."— Kenneth Turan
Keep scrolling for more
Keep scrolling for more
Test Your Vocabulary
The Exceptions Quiz III
-
- Which of these words does not mean "nonsense"?

Can you spell these 10 commonly misspelled words?
TAKE THE QUIZ
Spell words. Make bears.
TAKE THE QUIZLove words? Need even more definitions?
Merriam-Webster unabridged
Words at Play
Ask the Editors
Share keister
Time Traveler for keister
The first known use of keister was circa 1930
See more words from the same year