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Webster 1913 Edition

Noun.

Bad small beer; also, the refuse or dregs of liquor.

[Obs. or Prov. Eng.]

The

taplash

of strong ale and wine.

Taylor (1630).

taplash ‎(uncountable)

(obsolete, Britain, dialect) small beer of bad quality
(obsolete, Britain, dialect) the refuse or dregs of liquor
The taplash of strong ale and wine. — Taylor (1630).