A petty officer assisting the boatswain aboard ship.

plural of Blind swine mate

(chess) A checkmate pattern in which the king is confined to two squares at an edge of the board and then mated by two doubled rooks.

(chess) A checkmate delivered by a pawn.

(chess) A checkmate delivered by a major piece along the back rank against a king whose advancement is prevented by pieces of its own color (most commonly pawns).