When you leave an event, party, or group of friends without saying good-bye.
I was so drunk last night I had to ninja-roll before I made a fool of myself.
by NinjaMang March 30, 2009
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when hot girl leaves the bed by performing a backwards roll over her head and shoulders and landing with her feet on the floor while exposing her butt while she rolls. Usually involves the person performing the ninja roll to be somewhat flexible and athletic or just in a big hurry to get out of bed.
Charlotte tried to do a sexy ninja roll out of bed yesterday but failed terribly and fell on the floor
by henryIV81 February 8, 2011
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When a woman or man has an orifice pumped full of semen and then manages to stealthily roll out of bed without spilling a single drop of seed on either the bed or floor during the trip to the bathroom to deposit said semen in the toilet.
I banged her rotten then she ninja teacup rolled her ass to the bathroom without spilling a drop of my immaculate seed!
by allison's giant bush December 3, 2013
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a worldwide overnight sensation that crumbles under the weight of its hitherto unimaginable awesomeness only to rise from the ashes phoenix-like to reclaim its rightful place in world history.

Derived from the all-girl punk/pop/thasher band of the same name, best known for Blangie 2000:World Tour and "The Limo Flew Out of My Eye (Crying Limousine Tears)"
"It might look bleak now but if all goes well we might just pull a NERUSA"
by Marguli July 28, 2005
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