boo·mer·ang 
(bmə-răng′)
(bmə-răng′)n.
1. A flat, curved, usually wooden missile configured so that when hurled it returns to the thrower.
2. A statement or course of action that backfires.
intr.v. boo·mer·anged, boo·mer·ang·ing, boo·mer·angs
To have the opposite effect from the one intended; backfire.
[Dharuk bumariny.]
boomerangtraditional V-shaped model