play a straight bat

play a straight bat

 
1. (British) to avoid answering someone's questions or giving them the information they want When asked about the affair, he plays a straight bat.
2. (British old-fashioned) someone who plays a straight bat is honest and has traditional ideas and beliefs Wilf has played a straight bat all his life - I can't believe he'd get mixed up in anything illegal.
See also: bat, play, straight