Noun used within the E-cig, or vaping community to indicate a female Vaper who uses Tanks on their APV (advanced personal vaporizer) exclusively. "Tanks" come in many forms, shapes (usually round) and sizes, but are usually 3ml size or 5ml size (but others sizes are available); currently (11/2012) tanks contain either rebuildable atomizers or disposable cartomizers to turn the e-liquid contained within the tank into vapable steam/mist.
(This is not a noun used in connection with MJ or substances other than e-cigarettes, personal vaporizers, e-juice and tanks)
Clerk 2. "I sold her two yesterday! She said that's all she uses, she's a real Tankinista!"