D defs.my
Entry 2 senses Webster, 1913

Blackstrap

/(-străp)/ · Black·strap · IPA
01 n. A mixture of spirituous liquor (usually rum) and molasses.
  1. 1.
    A mixture of spirituous liquor (usually rum) and molasses.
    “No blackstrap to-night; switchel, or ginger pop.” — Judd.
  2. 2.
    Bad port wine; any common wine of the Mediterranean; -- so called by sailors.