it is a lemon wine made from lemon concentrate and using a yeast slurry to start it. A yeast slurry is what you leave behind when you rack your wine from the primary to the secondary from a previous wine. Example would be if you made a blackberry wine and when you did your first racking from the primary to the secondary, what you have left is what you would use to start a skeeter pee with.
Lon, the creator of skeeter pee, has a web site you can get the recipe from www.skeeterpee.com