Emo Ninjas are emo kids at concerts that when they are in the mosh pits and they decide its too crowded they spin around with their fists out whacking and hitting people
The flailing emo Ninja managed to hit me in the face at the show
An emo ninja is generally a emo kid who goes around going 'omgosh ninjas are so cool they make me want to crap my pants!!!'
they talk about their 'awsome' ninja 'skills' and have pretend ninja fight with their emo friends
Jim: hahaha i will kick yo ASS with my awsome emo ninja skills
Kate: NOWAY cuz my emo ninja skills are so way more, like SKILLFULL than yours!!!