gavel
n
small hammer used by an auctioneer or chairman as a signal for order or attention (拍卖者或主席用的)小槌
bang, rap, etc one's gavel on the table 用小槌在桌上猛击、 敲打等.
A foreigner living in a Swedish village wrote to the Ombudsman complaining that he had been ill-treated by the police, simply because he was a foreigner.