Origin of keister
Examples from the Web for keister
Zafu Via huggermugger These delightful Japanese meditation pillows are great from when you want to rest your keister.Work Like Churchill-Ditch Your Office Chair and Embrace the Standing Desk|Gregory Ferenstein|June 2, 2014|DAILY BEAST
Now, Tuttle, set down that there keister of yours—that gripsack—and listen.Local Color|Irvin S. Cobb
noun slang, mainly US
Word Origin for keister
"buttocks," 1931, perhaps transferred from underworld meaning "safe, strongbox" (1914), earlier "a burglar's toolkit that can be locked" (1881); probably from British dialect kist (northern form of chest) or its German cognate Kiste "chest, box." The connection may be via pickpocket slang sense of "rear trouser pocket" (1930s).