After Googling, it would seem to be HEELTAPS. Squre Headlong apears in a book by Thomas Love Peacock called Headlong Hall, and doesn't seem to like them.
However from the quick look at the book that I had, I have no idea what he is referring too with "Off with your heeltaps" and " Push about the bottle: Mr Escot, it stands with you. No heeltaps. As to skylight, liberty-hall."