look up any word, like dirty sanchez:
 
1.
a retail offer that appears to offer you something of great value for no extra charge but which really gives you something which will probably sit in a drawer and never be used.
2 pairs of spectacles for the price of 1 is a specsaver.
most spectacle wearers know that if they break their glasses they can revert back to their old pair as an emergency measure especially as a new pair can be made up in a few days.what usually happens is that the optician will try and use the free second pair as an opportunity to sell you a coating or tint which you will rarely, if ever, use.
if you visit the optician every 2 years you just end up with lots of unused free second pairs.
by Nesty. January 03, 2012