Agreeing to an event or function well in advance and leaving it until the last minute to cancel, subsequently fucking up your friends plans. Usually sent via non verbal means and comprising of multiple but equally pathetic excuses
Mike: Think I'm going to have to give tonight a miss mate. I'm shattered and I don't think I can really afford another night out this week as I'm meant to be putting a deposit down on a house next week. Could maybe do the pub at the weekend though.
Adam: Classic Bail-den.