I'mOldGregg's definitions
Comes from the term Silent But Deadly (SBD): 'A fart that is not heard, but smells so horrid that it could kill.'
As ninjas too are silent... but deadly.
As ninjas too are silent... but deadly.
'Wind down the windows, I think there's a ninja in the car'
by I'mOldGregg April 21, 2009
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