You'll be sure to find your answer over at Sake World, the site run by expert John Gautner.
 
http://www.sake-world.com/

Really, you asked and no one there knew? That's a surprise.
 
You're not by any chance thinking of 迎え酒／むかえざけ／mukaezake, are you? The name literally means "greeting/welcome sake." But it is more correctly translated into English as "hair of the dog." I assume you know what that means, but for anyone who doesn't it means having a drink to get over your hangover from the night before.