One mate short of a kickabout

Andy was meeting his mates for a kickabout at the 3G, and wanted to get a bit of driving practice in. When we arrived at the car park though, there was nobody else there. 

While he was calling to find out where they were, I shouted "Billy No Mates!" as I drove off and left him. 

I'm pretty sure that's what he would describe as Rotten Patter.