My wife's family is rooted in rural northeast Missouri near the Iowa line and the Mississippi River. Her mom's family would speak of "not being work brittle." This is confusing because it meant that if you felt energetic and ready for a day's work, you DID feel work brittle, which seems backwards or counterintuitive, but that was the way the idiom came down. My wife claims her lineage as English, French, Scandinavian, and Osage; I'm supposing that this came with the English roots. My father referring to a tough cut of meat used to say it was "tougher than boiled owl." My folks used to call an ornery older woman as "an old battle ax."