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1.
To deny your enemy's request and totally annihilated them afterwards
Victim:Please Dont Kill Me!
*shoots in head*
Killer: You've Just Been Dannihilated!
by The Dannihilator January 12, 2011
 
2.
To destroy with extreme speed and force untill nothing is left.
My score in halo will dannihilate yours.
by jesterklein June 16, 2009