heeltap

Etymology

heel + tap

noun

1. A piece or wedge that raises the heel of a shoe.
2. (dated) A small amount of (especially alcoholic) drink remaining at the bottom of a glass.
   A heeltap! a heeltap! I never could bear it! So fill me a bumper, a bumper of Claret! Let the bottle pass freely, don't shirk it nor spare it, For a heeltap! a heeltap! I never could bear it. 1815, Thomas Love Peacock, Headlong Hall
   "He's a good fellow, anyway, if he is a teetotaler!" "Drink his health!" "Give him a rouser, and no heeltaps!" 1894, Mark Twain, “Chapter 11”, in Pudd'nhead Wilson

verb

1. (transitive) To add a piece of leather to the heel of (a shoe, boot, etc.).