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Someone who practices naturopathy or "alternative medicine" such as reiki, accupuncture, herbalism, reflexology, osteopathy ...etc.

Often used in a somewhat derogatory way to describe healing based on flaky science for gullible people.
After spending thousands of dollars and many months going to a fish-slapper, i finally went to a real doctor and the problem was fixed within days.
by LarryLaffer April 14, 2011
tsl is a homo fish slapper
by Anonymous September 22, 2003
a goat fucking ho on a guitar building forum
by Anonymous September 22, 2003