When you are texting someone and hit "send" accidentally before actually writing anything. Subsequently sending a blank text. Using this phase completely absolves your texting incompetence.
George: Hey Gina
Gina:
George: Uh, you sent a blank text.
Gina: Sorry George my phone has premature etextulation.
It's when you are texting someone and you accidentally send the text before you're done writing it.
I justgot a text from someone that ended in the middle of a sentence. He must have had a premature etextulation because he sent the end of the sentence in another text.