1. To post an extremely awkward comment on someones wall or photo on facebook, thus abruptly stopping any previous comments or conversations on that thread.
2. When someone with no life makes a comment on facebook that is so awkward that no one wants to respond or comment after it, making the thread inactive or dead.
6:20- Bob: hey man that pic from last night?
6:21- James: yeah man sicker nights were had
6:21- Nick: Hey you guys when was this? How come i didn't here about any of this going on?
11:00- Fred: way to dead thread the photo dude
Hilary: so I was talking to that guy I like last night on facebook and some awkward bitch made a total dead thread comment.
Carey: aww that sucks what a mood kill!
when, during an online thread, there is a fight/interferance that causes the creator of the thread to stop the communication inside of it.
Billy: ok guys, this is getting out of hand. DEAD THREAD!