a card game for two players in which the object is to acquire one’s opponent’s cards. Players alternately turn cards up and if an honour is revealed, the other player must find an honour within a specified number of turns or else forfeit the cards already played.
(especially of national policy) self-aggrandizing at the expense of competitors:the economic recession had been intensified by the adoption of beggar-my-neighbour policies
beggar-my-neighbour in other Oxford dictionaries
Definition of beggar-my-neighbour in the US English dictionary