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1.
A failed terrorist. Coined after Times Square bomber Faisal Shahzad.

The 'shoebomber' Richard Reid and the 'underwearbomber' Umar Farouk Abdulmutallab are also wannabombers.
"Did you hear about that carbomb in Times Square?"

"Was anyone hurt?"

"Nah, it was just another wannabomber."
by Laura-May May 08, 2010