gronk

from Jargon File (4.4.4, 14 Aug 2003)
gronk
 /gronk/, vt.

   [popularized by Johnny Hart's comic strip B.C.: but the word
   apparently predates that]

   1. To clear the state of a wedged device and restart it. More severe
   than `to {frob}' (sense 2).

   2. [TMRC] To cut, sever, smash, or similarly disable.

   3. The sound made by many 3.5-inch diskette drives. In particular, the
   microfloppies on a Commodore Amiga go "grink, gronk".
    
from The Free On-line Dictionary of Computing (8 July 2008)
gronk

   /gronk/ Popularised by Johnny Hart's comic strip "B.C." but
   the word apparently predates that.

   1. To clear the state of a {wedged} device and restart it.
   More severe than "to {frob}" (sense 2).

   2. [TMRC] To cut, sever, smash, or similarly disable.

   3. The sound made by many 3.5-inch diskette drives.  In
   particular, the microfloppies on a Commodore {Amiga} go
   "grink, gronk".

   [{Jargon File}]
    

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