Retched skum is a dirty fukker whom wants to eat the bloodclart money out your pockets.
Steve (your good friend) :Paul can I borrow £10 and I will give you it back Friday.
Paul : yeah sure I need that money back
Steve : calls Paul on the Friday and says I don’t have the money.
Paul : I need my money RIGHT NOW!
Steve : NO IM NOT GIVING YOU IT .
Paul : I’m gonna kill your family if you don’t give it me in the next 2 days.
Steve : NAH DON NOT HAPPENING.
Paul : 2 days have passed and I don’t have my money so I’m gonna pull out the Mac 10 on his family and gat them down the RETCHED SKUM.