verb. To make plans with a friend or group of friends and then back out shortly after. This pertains to plans created by said person or by others wishing to interact with them.
Matt got a group of people together to go play pool, but when we called and asked where he was, he was at home playing GTA IV. He definitely Colliered Out on us!

Jim-bob was supposed to go to a show with Mike on Saturday, but he Colliered Out by going to a Dodge SRT4 convention.
by banannahammock March 30, 2009
Get the Colliered Out mug.