Poker Acronyms - WP
WP = "Well played"
Usually used at online poker tables - "WP" is short for "well played" and is generally typed by a player in response to another player playing especially well, for example by check-raising, smooth-calling with a monster hand, or in some way ensuring their maximise their winnings on a hand. Also typed by players at tournaments when another player busts out - "wp" here is generally a compliment to the player's overall playing rather than a compliment about an individual hand.
Note: players often type WP to a player whilst simultaneously making notes about how terrible their play is.