What posters on a message boards will sometimes say in response to a thread/topic that will eventually be locked/closed. This is a way to show that the thread is incredibly dumb or goes against the rules of the message board. Used to sometimes get in a free post to raise one's post count before the topic gets locked, preventing any further posting in it.
Person 1 Posts: Topic-This Forum Sucks!
Person 2: In Before Lock!
Person 3(Moderator/Admin): This topic is locked for bashing the message board and being dumb.
Person 2: In Before Lock!
Person 3(Moderator/Admin): This topic is locked for bashing the message board and being dumb.
by IceWarm March 9, 2006
Phrase used to imply that a forum thread is either stupid or pointless and is going to be locked by a forum mod/admin. It's a much cooler way of saying "I bet this thread is gonna be locked soon".
OP: Hey everyone, I thought I'd just bring up something that's been posted several times before...
OP+1: In before the lock! ;
Forum Admin: I'm locking this thread because its stupid and pointless and has been brought up several times before.
OP+1: In before the lock! ;
Forum Admin: I'm locking this thread because its stupid and pointless and has been brought up several times before.
by Atomik Spongeface June 21, 2008