'As soon as the bacon was well underway, and Millie, her lymphatic aid had been brisked up a bit, by a few deftly chosen words of contempt, she carried the cloth, plates, and glasses into the parlour and began to lay them with the utmost eclat.'

What does the term lymphatic mean as it is used in the sentence?
O sluggish
• cheerful
O energetic
O relating to a lymph node

The term "lymphatic" in this sentence is used to describe Millie as sluggish or lacking energy.