1. 
   On The Hook
   On the hook is slang for waiting. On the hook is slang for in a dangerous or difficult situation.
   Found op http://www.probertencyclopaedia.com/browse/ZO.HTM
   
   
2. 
   On The Hook
   On the hook is slang for waiting. On the hook is slang for in a dangerous or difficult situation.
   Found op http://www.probertencyclopaedia.com/browse/ZO.HTM
   
   
3. 
   On-Hook
   ===Nat.tang=== FINAL (0/1/0); Ended 05:01, 31 May 2007 (UTC) Please keep criticism constructive and polite. If you are unfamiliar with the nominee, please thoroughly review Special:Contributions/Nat.tang before commenting. ====Discussion==== Support Oppose Neutral ...
   Found op http://en.wikipedia.org/wiki/On-Hook
   
   
4. 
   On-hook
   In telephony, the term on-hook has the following meanings: The act of going on-hook is also referred to as releasing the line or channel, and may initiate the process of clearing. See also disconnect supervision. ...
   Found op http://en.wikipedia.org/wiki/On-hook
   
   
5. 
   on-hook
   the condition of a telephone set which is idle
   Found op http://www.electropedia.org/iev/iev.nsf/display?openform&ievref=722-10-10
   
   
6. 
   onthehook
   1) In danger 2) Obligated, so to speak
   Found op http://www.mijnwoordenboek.nl/EN/crossword-dictionary/onthehook/1
   
   

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