This is a fishing term - the image is of the fish swallowing the hook, the line, and the sinker that keeps the bait underwater.
sinker
what do you mean by TT impulse line hook-up??????
No, the phrase "top of the line" is not hyphenated.
Hook Line and Dinner - 2011 was released on: USA: 7 June 2011
Hook Line and Sinker - 1922 I was released on: USA: 12 November 1922
Hook Line and Skillet - 2011 was released on: USA: 29 March 2011
Hook Line and Stinker - 1958 was released on: USA: 11 October 1958
Hook Line and Stinker - 1968 was released on: USA: 1 March 1968
Hook Line and Sisters - 2011 was released on: USA: 29 December 2011
Hook Line and Sinker - 1927 was released on: USA: 28 August 1927
Hook Line and Sinker - 1930 was released on: USA: 26 December 1930
Hook Line and Sinker - 1939 was released on: USA: 8 September 1939
Hook Line and Melody - 1929 was released on: USA: 25 August 1929