Decorate the oak 

When it's your turn to buy a round of beer, and you are reticent to get up and go to the bar, someone in your company could say to you "Decorate the oak". This means simply to put more decoration on the oak counter e.g. a few more pints of beer

"Decorate the oak ya scabby bastard. It's your round"

Decorate the oak by Ally Dick October 6, 2016