Captain Crunch 1. ("Cap'n Crunch") An early 1970s // who used a free whistle included with "Cap'n Crunch" breakfast cereal to fake pay phone system tones and make large quantities of free phone calls. Also alludes to "". {Home (http://www.well.com/user/crunch/)}. 2. (After the above) . 3. Reportedly, a program which es a computer by overloading the . (1998-08-25)