What does "thriftlessness" mean?

The property of being thriftless.

Thriftlessness

Common synonyms include: hastiness, improvidence, negligence, shiftlessness, thoughtlessness, waste.

noun

noun ·Rare ·Advanced level

Noun

1
The property of being thriftless. uncountable
"His habits of thriftlessness have made him accustomed to yielding to impulses."
2
the trait of wasting resources wordnet

"His habits of thriftlessness have made him accustomed to yielding to impulses."

From thriftless + -ness.