The Collaborative International Dictionary of English v.0.48:

Crabbed \Crab"bed\ (kr?b"b?d), a. [See Crab,n.]
   1. Characterized by or manifesting, sourness, peevishness, or
      moroseness; harsh; cross; cynical; -- applied to feelings,
      disposition, or manners.
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            Crabbed age and youth can not live together. --Shak.
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   2. Characterized by harshness or roughness; unpleasant; --
      applied to things; as, a crabbed taste.
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   3. Obscure; difficult; perplexing; trying; as, a crabbed
      author. "Crabbed eloquence." --Chaucer.
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            How charming is divine philosophy!
            Not harsh and crabbed, as dull fools suppose.
                                                  --Milton.
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   4. Cramped; irregular; as, crabbed handwriting. --
      Crab"bed*ly, adv. -- Crab"bed*ness, n.
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WordNet (r) 3.0 (2006):

crabbedness
    n 1: a disposition to be ill-tempered [syn: crabbiness,
         crabbedness, crossness]