A Nod Is As Good As a Wink... to a Blind Horse was created in 1971-03.
It's not an idiom, it's a saying. If the horse is blind, it can't see either the nod or the wink, so they'd mean the same thing to the horse. You nod when you're agreeing and you wink when you're sneaking around with something.
A nod is as good as a wink to a blind horse.
Maddison Square Gardens New york
WINK-TV was created on 1954-03-23.
Wink Technologies was created on 2004-08-19.
Quicker'n a Wink was created on 1940-10-12.
Wink - song - was created on 1994-04-11.
The Wink - Seinfeld - was created on 1995-10-12.
Wink of an Eye was created on 1968-11-29.
Give Us a Wink was created in 1976-03.
Velvet - Wink album - was created on 1990-07-11.
i think this is an amalgamation of 'a winks as good as a nod to a blind man', and, a word is enough to the wise (and a few other variations). hope this helps.