n. One who knocks the fork off of people's plates. Extremely offensive term in New Zealand, especially if spoken in a New Zealand accent.
New Zealand Dude: "Hey dude, what's up?"
Other New Zealand Dude: "Bugger off ya fork-knocker!"
First New Zealand Dude: *pulls out knife and cuts off ballsack of Second New Zealand Dude* "I'LL SHOW YOU FORK-KNOCKER!!"