occurs when one is trying to catch up with a friend and discuss dirt, but said friend's significant other enters the room and conversation must shift to "appropriate" topic so as not to upset the significant other or lead to unwanted interrogation. Significant other has "talk blocked" your conversation. Talk Blocker may also be any third party who walks into a conversation that the original parties do not want to share info with.
I couldn't wait to talk about what I wanted to do to him, but then his sister showed up and talk blocked, and we got stuck discussing her kids for an hour.
"Ceph was just about to bag that pregnant girl until her friend came over and talk blocked him."
"Jabroni is totally hitting on that girl I was talking to earlier, I'm gonna go ask him how his herpes is doing and talk block him."
2. Chris and Peter were chilling in their room talking about whether or not they would get baked but Peter's mom burst open the door leaving them to talk about other matters. She was a huge talkblock!
Everyone: Mary get out of the middle of the circle you're talk-blocking Tene...again.