Fit To Be Tied Meaning

(idiomatic) Very agitated or distressed; enraged.

Example: 1915, Kathleen Norris, The Story of Julia Page, ch. 8:
  Some girls can set around until they're blue moulded, and never a feller to ask 'em, and others the boys'll fret and pleg until they're fit to be tied, with nerves!
1922, James Joyce, Ulysses, episode 18:
  I was fit to be tied though I wouldnt give in with that gentleman of fashion staring down at me with his glasses and him the other side of me talking about Spinoza.
2007 June 3, Michael Leahy, "Driven to Extremes," Washington Post (retrieved 9 Oct 2008):
  If you've also been caught in a traffic jam, you're maybe fit to be tied by the time you get to work.