Atty = Atomiser/Atomizer this is the piece that heats up your liquid to create vapour
Cart, Cartridge = Normally empty aside from a bit of fibre in which you drip your juice into, when put on top of the Atty, the juice comes into contact and when you push the button or inhale on an auto battery, you get your vapor
Carto, Cartomiser/Cartomizer = esentially a combination of the Atty and Cart together. These are normally self contained, drip you juice in, top up when needed, attach the the battery and away you go. Most are in one or 2 peices.
VG, Vegetable Glycerine - Veg based glycerine in which flavours can be added to create e-liquid
Often sweeter and thicker than PG. More humectant.
PG, Propylene Glycol - Most common base for e-liquids, flavours can be added. PG provides a better throat hit and a drier vape.
VV= Variable Voltage Standard vaping batteries deliver a 3.7v output. Some people like to vape at higher voltages, in order to do so, you need a variable voltage device. Most go from 3.6v up to 5 or 6 volts
Don't be embarrassed if you have no clue what someone is talking about, deffo ask and someone will always be along to answer
Vaping is a whole new world!