The Collaborative International Dictionary of English v.0.48:

Brustle \Brus"tle\, v. i. [imp. & p. p. Brustled; p. pr. & vb.
   n. Brustling.] [OE. brustlien and brastlien, AS. brastlian,
   fr. berstan to burst, akin to G. prasseln to crackle. See
   Burst, v. i.]
   1. To crackle; to rustle, as a silk garment. [Obs.] --Gower.
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   2. To make a show of fierceness or defiance; to bristle.
      [Obs.]
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   To brustle up, to bristle up. [Obs.] --Otway.
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