TAG A tight/aggressive player, one who plays mostly strong hands, and plays them aggressively.
TARGET The weakest player at the table that everyone is actively aware of and trying to stack them as soon as possible.
TELL A physical or verbal mannerism that reliably gives you information about your opponent's holding.
THIN VALUE A bet for value when you are often behind but more often ahead.
TPTK Abbreviation. Top-pair, top-kicker. Example AT on a T82 flop.
TRAPPING Refers to slow-playing a hand in order to induce action.
TRIPLE BARREL When a player bets three consectutive streets postflop.