A person who pretends they are someone else via text message. For
instance: Picking up your boyfriend's
cell phone and
texting someone from his phone, as if you ARE the boyfriend.
Responding to a text message that wasn't meant for you as if you are the person it was meant for.
I thought I was texting
Jim last
night, but I found out it was actually
Sally. What a textersonator, I'll never trust her again.