VALUE BET
Bet with the intention of extracting value from a player holding a worse hand.
VALUE-OWNED
When you bet for thin value and get called by a better hand. The use of this term implies betting with the hand was correct, but unfortunately ran into a better hand.
VPIP
Voluntarily Put $ In Pot. How often a player voluntarily puts money into the pot given the opportunity. This ranges from 0-100, where higher numbers mean a player is involved more pots.