HUD

(Heads-Up Display)
general

Software showing real-time stats on opponents.

HUDs display VPIP, PFR, 3-bet%, fold-to-c-bet and dozens more stats. Most online sites except GGPoker support third-party HUDs; GG ships its own.

See also

Action
Your turn to act, or the overall betting activity in a hand.
Bad Beat
Losing a hand where you were a heavy statistical favorite.
Board
The community cards dealt face-up in the middle of the table.
Cooler
A hand where two players have very strong holdings — unavoidable losses happen.