What a rip-off!

• Rip可以當成"剝掉""撕掉"的意思

         - When something rips or when you rip it, you tear it forcefully with your hands or with a tool such as a knife.
         -  If you rip something away, you remove it quickly and forcefully.  

• 而rip-off可以指 "坑錢" 或者是 "索價太高的商品". 買了這個東西就好像被剝皮一樣. 

       - If you say that something that you bought was a rip-off, you mean that you were charged too much money or that it was of very poor quality. 

     ex.  If he thinks £5.40 a day for parking at Luton Airport is a rip-off, he should try Heathrow.