underruff noun 1verb 1forms 3 noun1 •An act of underruffing verb1 •To ruff with a trump lower than the trump already played by one's opponentAnd so, at trick five, when South ruffed a diamond with the board's queen of clubs, East, having a discard to make, found a gorgeous one— he underruffed with seven of trumps! — 1973 formsunderruffed · underruffing · underruffs
