Definition of cool tankard in English:

cool tankard

Pronunciation /ˌkuːl ˈtaŋkəd/

noun

  • 1historical A cooling drink, typically made of wine and water, and flavoured with lemon juice, spices, and borage.

  • 2British dialect The herb borage, Borago officinalis.

Origin

Late 17th century; earliest use found in Thomas Brown (bap. 1663, d. 1704), writer. From cool + tankard.