Wearing shoes or slippers down at the heel.

Yet another curious conflation of footwear with modes of existence. How did "wearing loose shoes" come to mean "negligent"? Was Bruce Lee, in his kung fu slippers, negligent? Of course not! In honor of Lee's philosophy, then, we should use slipshod to refer to a person who acts without attachment to the fruits of his actions. See: FLIP-FLOP, BOOTLESS.

Figuratively: Careless in dress, manners, style, etc.; slovenly; shuffling; as, slipshod manners; a slipshod or loose style of writing.

marked by great carelessness; "a most haphazard system of record keeping"; "slapdash work"; "slipshod spelling"; "sloppy workmanship"