Chamberlain was known by several nicknames during his basketball playing career. He disliked the ones that called attention to his height, such as "Goliath" and "Wilt the Stilt". A Philadelphia sportswriter coined the nicknames during Chamberlain's high school days. He preferred "The Big Dipper", which was inspired by his friends who saw him dip his head as he walked through doorways. After his professional basketball career ended, Chamberlain played volleyball in the short-lived International Volleyball Association, was president of that organization, and is enshrined in the IVA Hall of Fame for his contributions. He was a successful businessman, authored several books, and appeared in the movie "Conan the Destroyer". Chamberlain was also a lifelong bachelor and became notorious for his statement of having had sexual relations with as many as 20,000 women.