Sentence:  A <WSD>heeltap</WSD>! 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. 
Meaning of the word marked with <WSD> tags:  A small amount of (especially alcoholic) drink remaining at the bottom of a glass.