ninja swipe

to discretely (like a ninja) tuck an erection under the waistband of underwear or belt line of pants.

a true ninja swipe is done in one swift motion.

yo, i was freeballing in my sweats when i got a boner- i had to ninja swipe that shit so it wouldn't look like i was proppin a tent

by princealberto July 7, 2009

Ninja Lag

The warping of time and space so that a real event happens after it theoretically should

an example of ninja lag, in anime is when swordsmen or ninja slash their swords at each other, sometimes they have time to put their sword back into the sheath and walk away before the other person is actually cut by the blade.

by Sweaty man in your 7th period September 15, 2009

ninja turtleism

a belief that the 4 ninja turtles are really the 4 horseman of the apocalypse

dude u goin to the ninja turtleism benefit tomorrow

by marceld April 2, 2010

Nose Ninja

After you spend forever jamming a stupid little electric buzzer up your nose to trim the hair, the one or two really long pieces of nose hair that mysteriously escaped the razor and sneak out of your nose untouched later in the day.

Bro, I know what your saying is important, but I just can't stop staring at that really long hair coming out of your nose. It even wiggles a little when you talk... Why don't you trim that shit?

I tried, but those god damn Nose Ninjas are so sneaky!

by dkinirvine January 8, 2010

Ninja Eyes

The act in which one uses the "Ninja Eye" to stealthy check out a female.

Only the masters know how to use the Ninja Eyes.

by blackbeltinninjaeyeism October 14, 2009

Ninja-Signing

When an author secretly signs his/her own books in a bookstore without the bookstore's knowledge.

Brandon Sanderson is ninja-signing books in airports.

by jackatthekilns November 10, 2009

Ninja Proofing

Setting up your house to ward off long term ninja infestations. It's considered impossible to keep ninjas out entirely. In fact, attempting to do so can attract their attention and just make the problem worse.

1) Coat the walls and ceilings with steel backed teflon. If the steel isn't thick enough, they can still use their claws. Make sure it's at least a 1/4 inch thick.
2) Install random rotating magnets. This makes it difficult to throw shurikens accurately.
3) Set up a DVD of old "Kung Fu" reruns in infinite reply. Warning: This may cause Seppuku incidents, which are really messy. Take my word on it. Spread plastic in front of the TV.

Avoid using pirates. I know it's tempting, but they're worse than ninjas (really loud and smelly and treasure chests are hard to find).

Bob: Where were you last weekend?
Bill: Sorry, spent all day Saturday Ninja Proofing.

by Al Benedict December 3, 2010