A person who will sext anyone and/or everyone in his/her contact list. This act is often done when drunk texting as the sender keeps one eye closed in order to see the phone screen. In this pose, the sender looks like he/she just received a pirate face.
This term does not apply to someone who has had their phone iJacked.
A bisextual should not be confused with a homosextual, whose sexting is usually intented to be comical in nature and not taken seriously.
Dude: OMG! I just got a sext from Bill! It shows him doing the meatspin and asks if I want to be next!!
Female friend: STFU!! I got the same message!!!
Dude: Bill is one crazy ass bisextual!