1. <person> ("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".
2. (After the above) wardialer.
3. Reportedly, a program which crashes a computer by overloading the interrupt stack.
Try this search on Wikipedia, OneLook, Google
Nearby terms: CAPI « Cap'n Crunch « Captain Abstraction « Captain Crunch » CAPTCHA » CAR » card