Ninja Vulture 

A roommate who steals your food in the fridge behind your back. They do it in a sneaky way by figuring out your schedule and stealing tiny portions when you’re at school/work.

“Dude I think Joe might be a ninja vulture.”
“Yeah that explains why my mashed taters keeps disappearing!”

Ninja Vulture by TheShuckDriver November 20, 2019

ninja cancer

An unexplained illness in an anime that causes extreme the character to be sick but still beat ass

Itachi had ninja cancer when he fought Saskue.

ninja cancer by Not a weeb March 1, 2020

Ninja pee 

peeing on the side of a toilet bowl to pee silently

I ninja pee so people can’t hear me pissing(my walls are thin)

Ninja pee by god of carrots May 15, 2021

Ninja Nerd

A person who hides how much of a nerd he is by acting normal majority of the time. Only his closest friends know how much of a nerd he is while others are unaware.

Joel is such a ninja nerd, he acts normal but we know he's a huge geek deep down.

Ninja Nerd by poiboyJ August 18, 2008

Ninja bitch-slap 

When a regular bitch-slap just isn't enough, a Ninja bitch-slap incorporates the ancient use of covert agents or mercenarys of feudal Japan specializing in unorthodox arts of war. The functions of the ninja included espionage, sabotage, infiltration, assassination, as well as open combat in certain situations. The underhanded tactics of the ninja were contrasted with the samurai, who were careful not to tarnish their reputable image.

A properly executed Ninja bitch-slap will probably land you a top spot on the bad ass list, right under Chuck Norris.

Scott: I wouldn't mess with Trevor if I were you, man.
I heard he Ninja bitch-slapped one guy so hard he left the country- completely disappeared...

Joey: That guy graduated dumbass,
he works at Taco Bell.

Scott: Oh, did he, Joey?
..Did he?

Ninja bitch-slap by thesameoldshit March 9, 2010

ninja 300 

A 300cc sportbike manufactured by Kawasaki, and the motorcycle of choice of any 16-year-old mini Rossi chad squid that wants to have at least a sliver of a chance of getting insured.

guy: damn ben bought a ninja 300!

girl: wow I hope I can ride it... then him

ninja 300 by danknooner69 January 18, 2022

ninja farts 

Silent, butt supremely smelly flatulence.

I love to release my ninja farts when I am standing on the diving board before a dive. It really fucks up the next competitor.

I also love to release my ninja farts while getting my salad tossed by a male prostitute.

ninja farts by Gregg Loogyanus November 28, 2006