slipshod

Concise Oxford English Dictionary © 2008 Oxford University Press:
slipshod/ˈslɪpʃɒd/

▶adjective

• 1 lacking in care, thought, or organization.

• 2 archaic (of shoes) worn down at the heel.

– origin C16 (orig. in the sense ‘wearing slippers or loose shoes’): from slip1 + shod.