Pork Scratchings

Means you’re running low on money, or have no money to do anything when it comes to going out with your mates
Or saving the last amount of your money left and staying indoors until the next payday

Friend; “come out with the boys tonight for a few pints”
You; “nah I can’t tonight mate I’m running off pork scratchings at the minute until my next payday”
Friend; “no worries mate catch you next time”