You shave every morning, and in this season you shave by the sunlight; but since your shaving is less and less complete as we get farther back on the left side, until it becomes positively slovenly as we get round the angle of the jaw, it is surely very clear that that side is less illuminated than the other.
There are no more uses of "slovenly" in the book.
Show samples from other sources
I could tell that Go had gone to meet with the doctor by herself, taken her studious notes in her slovenly handwriting, and she was teary as she tried to decipher what she’d written.
Gillian Flynn -- Gone Girl
For the first time, I felt cold to her, like an ice sheet had fallen between us, and a picture of her began entering my mind, her dark form moving through the corridors of a dingy, slovenly house, peals of surly laughter trailing after her.