phone phreak
Ⅰ ⇨ phone phreak; phone freak; phreaker
noun a person who electronically and fraudulently manipulates international telephone calls. UK use. The original phone phreaks thought of themselves as telecommunications hobbyists (John Markoff, Wired Style, 1996) US, 1972
Ⅱ ⇨ phone phreak; phreak
verb to hack into a telecommunications system. A play on 'freak' US, 1998