WOW in this context means White on White or no imprint of any kind on the Blotter.
I'm so used to hear about actual "WOW" blotter being around in the US and here since quite a while, when the threads get bumped, they come up often. Most of the early LSD I did in 1999-2002 were white and unperfed but they had the same kind of individual drawings in either red, green or blue and I saw that print, the kind the guy from Manitoba had posted a picture of. pop culture, punk logos, grateful dead logos, tripping jesus, syringe with NO next to it, the name of my city taking the space of two 2 blotters in the centre of the sheet a couple times, which led me to believe the liquid was laid right here.
Never seen plainly white, unperfed, without lines of 1/4 inch by 1/4 inch squares though. My first very dose was almost like that, but if you got the light right, you'd see the hologram of the Nike symbol, man I can still remember the pain in my cheek muscles from being unable not smile and laugh all the time from that first time, was with good friends too, perfect set and setting. Didn't feel burnt out or waiting for it to end rolling around in my bed after it was over, likely cos I took very little alcohol with it. alcohol hangover + 9-10-11-12h of a trip is a terrible feeling.
So, thanks, I feel so uncool now, me who's had lsd 250 times at least, had some log of my trips on text files, its all lost, can't know such simple acidhead acronyms ;p