Green’s Dictionary of Slang

the nunchuku, a martial arts weapon modelled on a Chinese rice flail and made of two hardwood sticks linked by a chain.

1979		H.C. Collins Street Gangs 222: Chuka Sticks Unlawful weapons.
1987		‘Joe Bob Briggs’ Joe Bob Goes to the Drive-In 97: I’m still tryin to get the nacho smell off my skin where it ran down both sides of my face and got my Speed Chuck handles so sticky they’ll probly never be the same again.
1992		Bentley & Corbett Prison Sl. 87: Chucks A martial arts weapon. In prison, nunchucks are made by joining cut sections of broom handles, generally six to twelve inches in length, with leather laces, shoe strings or woven string.