Black Friday starts and people get in lines for hours, trample other to death and buy stuff they don’t need – all because they believe they get a deal of a life time.

‎50% off has many meanings:
1) That shop is ripping you off the rest of the year
2) It was produced to be 50% of the original quality
3) The product is so bad no one else wants it
4) They added 100% to give 50%

and probably a few other meanings. Read more