Definition of "keister" []

• Slang The buttocks. (noun)
• Slang The anus. (noun)

American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

• "As for the slate floors and dim lights, falling on your keister is a definite maybe."
• ""Wait till her fat keister is sitting at this desk," he once said (except he didn't say "keister")."
• ""keister" the syndicate's constitution in his rectum, along with the master hit list which, by now, read fifty names long."