This happens when the girl you like is with another guy. So, in order to make sure that guy does not get with the girl you like, you constantly text message the girl. If you get a reply, you have just successfully text blocked another guy.
In the following situation, Guy2 has successfully text blocked Guy:

Guy: Hey, lets go back to my place.
Guy2(from a different location): *Sends text message to Girl: Hey, lets hang out.*
Girl(to Guy): Ok...sure, but hold on I just got a text from Guy2. *She replies: I can't, I am with another guy.*
Guy2: *Text message 2: Is he chill?*
Girl: *Text message 2: Nope, i dont really like him too much, lets hang out later.*

However, in the following situation, Guy2 has failed to text block Guy.

Guy: Hey, lets go back to my place.
Guy2(from a different location): *Sends text message to Girl: Hey, lets hang out.*
Girl(to Guy): Ok, let go. *Gets a text message and pays no attention to it.*
by Your Move Chief May 12, 2009

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Top Definition
While in class or an important meeting where texting is prohibited, one uses a book, wall, backpack, person, etc blocking the view of you texting from the teacher/instructor.
Ryan: "He Sally, I need to use your backpack as a text block."
Sally: "Ok, just don't make it obvious!"
by ManOfCars March 04, 2009

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To prevent a male friend or associate from having sex.
Adam was about to kiss Crystal, when a text from Fred on Crystal's cell phone ruined the situation. Fred totally textblocked Adam.
by MrBananaJoe November 30, 2011

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