The Collaborative International Dictionary of English v.0.48:

Gaskins \Gas"kins\, n. pl. [Cf. Galligaskins.]
   1. Loose hose or breeches; galligaskins. [Obs.] --Shak.
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   2. Packing of hemp. --Simmonds.
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   3. A horse's thighs. [Prov. Eng.] --Wright.
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