Captain Crunch 1.("Cap'n Crunch") An early 1970s {hacker}/{phreaker}/{phacker} 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 "{crunch}". {Home (http://www.well.com/user/crunch/)}. 2. (After the above) {wardialer}. 3. Reportedly, a program which {crash}es a computer by overloading the {interrupt} {stack}. (1998-08-25)