It's same as "grinding".

Freak dancing should mean: A person who tries grinding, but is not good at it.
Hence the word "freak", which means "A thing or occurrence that is markedly unusual or irregular".
Danica is good at freak dancing, but Sally can grind!
by Jen June 19, 2006
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When a female places her ass on a male\'s penis area and moves it around to try to make a \"tent\"
Lisa freak danced with joe and he got a major hard on because her ass was shaking TONZ!
by un answerable April 27, 2005
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