Having beautifully proportioned buttocks.(adjective)
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.
Use "callipygian" in a sentence
"I love you forever for not only knowing the word callipygian, but using it correctly in a sentance. *applause*"
"Also, to use the word callipygian in my Sex Alliances Against Society"
"I admit my soft spot for callipygian is mostly because I learned it, via temvald, from the Fucking Little Hobbit (a philosphy prof at the 'Ford, not someone's Billy Boyd fantasy)."