[Dekkah]

TPK = Total party kill (or something like that)
MBA = Melee Basic attack (But you dont need to roll it right now as the creaure die on monique attack.

Here is a few other abv I use ;

OA : Opportunity attack
UENT (name) : Until the end of next turn (of the creature name)
USNT (Name) : Until the Start of next turn (of the creature name)
UEE : Until the end of encounter
RBA : Ranged basic attack
CA : Combat advantage
THP : Temporary Hit points