invisible ninja 

What some rappers, most notably Devlin fight whilst rapping - Moving their arms around like windmills trying to look "street" they look like they are blocking attacks from invisible ninjas

Dude! Why are you fighting invisible Ninjas! Stop flailing your arms around like a windmill.

invisible ninja by stragen November 2, 2012

invisible ninja 

When you see someone hxc dancing, They are fighting invisible ninjas so to speak.

I see an army of invisible ninjas in the mosh pit tonight. Who will stop them?

invisible ninja by TTVMike May 17, 2004

extremely fast and agile and often invisible ninja bastard 

a super annoying video game enemy that can run really fast, even around corners, to make you waste all your ammo.

I tried to beat that game the other day but the extremely fast and agile and often invisible ninja bastard made me game over all night

extremely fast and agile and often invisible ninja bastard by Kate Hanami November 7, 2021

fighting the invisible ninjas 

A pejorative / derogatory term for the art & practice of hardcore dancing.

Used by concert goers to describe typical maneuvers exercised by hardcore dancers during breakdowns, whereby the user does not look favorably on this art.

Warren - Everybody hold onto your drinks. The hardcore kids are fighting the invisible ninjas again.

Charles - There's no barriers and no security at the stage! We'll see you later Warren; it's stage dive time, and we've got work to do.

fighting the invisible ninjas by malarky2020 October 14, 2009