A smart ass comeback that means that you're right and the other person is wrong. the 'realities' being the different opinions in the argument or conversation. The quote has been Popularised by Adam Savage of MythBusters.
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T-SHIRT SIZE AND COLOUR CHARTS
Friendly debate? No! I reject your reality and substitute my own t shirt will help you out of a tight spot.
The thing that you ought to take into consideration is a I reject your reality and substitute my own t shirt is a must for all debaters of science or well, just life. It is necessary that you know your own opinions and have a smarmy smart alec comeback to a heated debate. When perhaps, boxed into a corner and not sure where to go with the conversation, point to your I reject your reality and substitute my own t shirt. It will stop the conversation long enough for you to regroup. People will be wary of taking you on. Wear this t shirt with a massive brain and huge cojones. This t shirt is available in a mind blowing array of sizes and colours. Have a look at the size and colour charts, prepare to be amazed.