1. Verb: Past tense
To have your attention "stolen" away from an intense activity (like playing a game) by the incessant ringing or ring tone of your phone, which of course, you have to answer.
Origin from 'hijacked': as the past-progressive meaning stolen in a violent fashion.
I was just about to frag this dude when I got phonejacked and some high-ping lamer fragged me from behind.