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2.
A shenanigan that turns into a debacle. Mischievous or playful activity that quickly becomes disastrous.
This bachelorette party quickly became a shebacle.
by Jac-Attack April 25, 2013
 
1.
When a good plan turns into a total disaster. A combination of a shabang and a debacle.
"Man I'm pissed. We were all having a nice picnic in the park until a PitBull stole our rasberries. "It was a total shebacle"
by Marcia April 12, 2005