play on

Verb

 * 1)  To exploit (a potential weakness or vulnerability) by exacerbating.
 * to play on someone's fears
 * 1)  To exploit (a double meaning, similarity in sound, etc.) for humorous or creative effect.
 * This joke plays on the fact that 'thirsty' sounds similar to 'Thursday'.
 * 1)   To impinge upon in a recurring or nagging way.
 * to play on one's mind, or conscience
 * 1)   To frequently allude to or return to as a theme.
 * The pamphlet plays on the idea that all social conflict is class-based.
 * 1)  to hit the ball into his own wicket, thus being out bowled
 * 2)  To let the game continue after a foul has been committed, because the situation is advantageous to the team who would be awarded a foul.
 * 3)  To cause (an opposing player) to be onside rather than offside due to one's position on the field of play.
 * The ref said that Smith was offside, but I think that Jones played him on.
 * 1)  To cause (an opposing player) to be onside rather than offside due to one's position on the field of play.
 * The ref said that Smith was offside, but I think that Jones played him on.