Definition of phone phreaking in English:

phone phreaking

(also phone freaking)

noun

US
  • The use of an electronic device to make illegal telephone calls, usually long-distance, either at a cheap rate or without paying.

Origin

1970s. From phone + phreaking, after phone phreak.

Pronunciation

phone phreaking

/ˈfəʊn ˌfriːkɪŋ/