nigger knocker

noun3

1. •
   (slang, offensive) A nightstick or a similar weapon.

   • So Harry runs to open up the deadlock. Now Joey got the nigger knocker wrapped around his hand real tight, dig. I know he about to correct me on some honky rules. — 2005
2. •
   (slang, offensive) A wooden baton used by truckers to check the tire pressure.
3. •
   (slang, offensive) One who participates in an act of nigger knocking.