One who is afflicted with a chronic psycological disorder associated with excessive and compulsive participation in extreme water sports. True fanaticism can lead to the loss of spouces, families, friends and jobs. Someone who is an aquaholic may have not have much of a social life from exhaustion from their water sport, or from lack of free time because their water sport takes up their life.
Jake: Hey Liz! wanna go to the movies with me friday night?
Liz:Sorry, I can't. I have swim practice from 6-9.