look up any word, like spook:
 
1.
The gentle art of matching identical clothes with a significant other (especially t-shirts).

It is not uncommon to see entire matching outfits, including shoes and accessories. Occasionally entire families and done up head to toe in matching outfits.

Most commonly seen in East Asian countries, but there have been sightings of such airbrushed classiness on the U.S. Gulf Coast.
"On the beach I saw lots of couple tees today."

"Oh my God, are those three guys wearing couple swimming trunks?"
by Greg Dolezal February 16, 2009