when your in a horrible "relationshit" and you get in a fight one day and the girlfriend happens to say a comment that will seem at first like the worst come back ever but soon will make you so friggin' angry that you go make a ass out of yourself in front of her
yeah steve i completely was fucking brain ninja'd, i walked in and just sounded like a complete dumm shit
When you break into your friend's (or cheating significant other's) Tinder account and go to townrandomly swiping as fast as you can before they get back.
"I wondered why all these fat chicks were trying to talk to me on Tinder, and then I figured out one of my friends totally Fruit Ninja'd my Tinder while we were out the other night."