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1) A Welsh whore who could do things with her one good arm that'd make you forget that thing on her neck.

2) A certain fork in the Missouri river named after the said whore.

3) A derogatory slang term used to describe a sexually overactive and altogether unattractive female.

This term was popularized by Chris Farley while portraying the fictional character Bartholomew Hunt in 1998's Almost Heroes.
That sick old town bike was a real Pittsburgh Nelly.
by holyshiite November 12, 2010
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