Why would you do this? What are you trying to accomplish? The meta description is rarely used in the search results any more. Google takes a snippet from your page content. I cannot understand why you would want to draw attention to a competitor in the same space you are trying to gain a click-thru. As many arguments as there are about the meta description being useless, I still use them and only add something that would attract the web searcher or a call to action to hopefully trigger the user to click my link.
Waste of your time IMO...
"Give a man a fish and you feed him for a day. Teach a man to fish and you feed him for a lifetime." Chinese Proverb
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