People now often use the abbreviation ptBB/100 to describe winrates – as in poker tracker big bets/100 hands.
This term is often used by people when describing win-rates, as an early poker database programme (poker tracker) measured winrates in big bets/100 hands. Big Bet is a term derived from Limit holdem, where there are two bet sizes – the big blind pre-flop and on the flop, and 2xthe big blind on the turn and river.