Derived from fornication (sexual intercourse between two unmarried people) and phone sex (sexual activities that take place over the phone e.g. talking dirty, sending nude pictures, etc)
The availability of cell phones to teenagers has led to a sharp increase in phonication.
Some girl who decides it is a good idea to, when sexting with her nerdy ass boyfriend, use her phone as a vibrator so when he sexts her she climaxes on her brand new sidekick.
Ya dude, turns out, that girl was using a Phonibrator. Weird dude...kinda hot though, huh? Hell yeah. Here lets go tbag her! HELL YES!