As an informal meeting in a co-worker's office was breaking up this morning, one of us guys noticed that someone had scrawled the phrase "[co-worker's name] is a callipygian" on the white board in his office. Upon being asked what the word means, the single young man sheepishly replied, "It means having shapely buttocks". (Sure enough, dict.org agrees on the definition.)
I don't know which was more entertaining, learning a new word, or knowing that someone actually wrote this on my co-worker's board. But at any rate, it was indeed entertaining.