Sluff Stick
From AmtWiki
A sluff stick is often an Amtgard legal weapon that is heavier than the average one. Sometimes it is a pixie stick where only part of the shaft has been torque wrapped. The result is a weapon that often makes a loud bang or pop when it strikes a player. Sluff sticks are designed by their builders to force players to take a valid shot, that a cheating player would normally try to ignore.