( informal ) A person who vocalizes quietly, in a whispering manner, or, ironically, one who is loud and outspoken.
1879 Jan., "A Night with Burglars" in Gleason's Monthly Companion, vol. 8, no. 1, p. 281 (Google preview):
The two who sat at a table in an obscure corner of the room were the noted burglars " Whispering Jack" and "Jim the Cracksman," as they were nick-named by their associates.
1981 March 8, John S. Wilson, " Barbara Cook—Pop and Polish," New York Times (retrieved 27 July 2014):
[T]he microphone enabled a Whispering Jack Smith to make a rhythmic mumble pass for singing and gave Bing Crosby a means of taking advantage of his casual, intimate style.
2002, J. John Loughran, Developing Reflective Practice, ISBN 9781135717230, p. 136 (Google preview):
Case 3 Jack was a quiet and perceptive young man who was well respected by his peers. Whispering Jack:
2004, Ray Scott, Street Justice, ISBN 9781413452273, p. 55 (Google preview):
Under the lone operating streetlight, Whispering Jack comes into full view. . . . In his usual low tone, . . . Jack speaks in the manner that earned him his nickname.
2005 Dec. 28, " John Travis Garrett," ancestry.com (retrieved 27 July 2014):
Some referred to him as " Whispering Jack" for his booming voice while many others called him Pappy.
c. 2009 , B. J. Sears, " Reddington's Phonelescope," Professor Sears' Technological Rarities (retrieved 27 July 2014):
Whispering Jack Reddington graduated from the Colorado School of Mines in 1899 and began his career as a mining engineer. His real passion however, was the transmission and amplification of sound waves. See also