A Ninja Defuse is where you get behind an enemy planting a bomb and defuse it as soon as they are done planting it. It's hilarious if you are the last one left and a pretty good way to embarrass the planter.
To effectively ninja defuse, you need to find a dark corner or a spot with high vegetation to camp in. You must have visibility of the plant site so you know when someone is planting.
My class for Ninja Defusing:
Primary: UMP45 Silenced
Secondary: M93 Raffica Silenced
Perk 1: Marathon Pro
Perk 2: Cold-Blooded Pro (Pro really helps, if you don't have pro, ninja defusing will be more difficult).
Perk 3: Ninja Pro
Death Streak: Who cares?
Make sure you stay still while you are camping in your spot. When someone starts planting get behind them and go prone. Hold X so that when they are done planting you will immediately start defusing. If they run away like most people do, you should pull it off.
*I Tap the Y button while I am camping so that I look like a dead body. People will walk right past me sometimes. It's pretty effective if the enemy is stupid enough.
Enjoy making the planter look like an idiot.
If you didnt please give credit to whomever did 
