i'm not coming to the pub this lunchtime, i'm staying at work to do a foreigner for a mate of mine
common british slang for unofficial work, often making use of company equipment/ time/ premises but solely for personal gain, unrelated to the interests of the company and/or tax department
"i'm not coming to the pub this lunchtime, i'm staying at work to do a foreigner for a mate of mine" What is the definition of "foreigner"?