bad dreams you get after taking ny-quil. it's not just a coincidence.
"I don't know what's worse: the taste of ny-quil or the ny-mares you get because of it.."
by chelseamonster August 24, 2007
1 more definition
The strange and horrifying nightmares experienced while sleeping under the influence of Nyquil.
I've got a bad cold, but if I've got to be up in 6 hours. If I take Nyquil now, the Nymares will shatter my fragile mind and turn me into a super villain.
by BrandonBob December 01, 2009