croydon half Share definition Flag Drinking term to describe ordering two pints of beer and downing the first before the barman has completed pouring the second. I was so thirsty, I had a Croydon half while I was getting that round. croydon half by Reddbird November 7, 2015 0 0 Get merch Get the croydon half mug. Buy Now — $32.95 See more merch