DCHP-1 Online
boondoggle 
n. a device used to take up the slack in a chin-strap, such as a large wooden bead, or a woven knot such as a Turk's head.
- 1957 . . . all wore black peaked caps similar to taxi drivers', except that these have a strap under the chin secured by a boondoggle, such as is worn on a cowboy's chinstrap.
- 1957 . . . all wore black peaked caps similar to taxi drivers', except that these have a strap under the chin secured by a boondoggle, such as is worn on a cowboy's chinstrap.