Instacall

Term used in poker referring to the act of "Instantly Calling" an opponents bet. An instacall is commonly seen against a very weak opponent, one that may have exhibited some sort of tell (ie leaning backwards or forwards in chair, checking hole cards), or just against a complete superdonk that has been bluffing at pots with deuce-seven all night. Term also implies that the player has absolutely no respect at all for the raise his opponent puts in.