Someone who spreads AIDS (HIV) in multiple places, such as night clubs, swimming pools, parks and the like. A poolshark is attracted to males, generally children. Dogs and horses are common subjects too.
Mother: My cat has been violated by a creature attracted to children and animals!
Police officer: Indeed. This is definately a poolshark on the loose.
someone who can frequently be found at local swimming pools in order to interact with younger members of the same or opposite sex.
Mr. Duffy has been near the kiddie pool for over an hour! He's becoming a regular poolshark.