A person who is a simp, but doesn’t show it. The person is like a ninja with his emotions. They are not easy to identify. If you ever notice a ninja simp, be careful, you could fall in love it you notice it!

They can give u attention and love, while you don’t know it.
A: Charlie said someone simps for me, do you know who it is?
B: No! But maybe he is a ninja simp?
A: God damn those ninja simps! Can’t the person see I’m desperate af???
by Big simp energy February 14, 2021
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Something that is not ass hard as it looks.
An action or job that once done the result looks like doing it was way harder that it actually was.
-''Last night was under ninja, thanks for the breakfast''

''-Paris Hilton is out of your reach
+No, dude, she's totally under ninja''

''-Dude, are you hard watching Up??
+no, it's just under ninja''

-''Yeah it was her first time but was pretty under ninja''
by Pidgeon Impaler August 22, 2021
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When someone, usually your parents, randomly springs a topic, usually sex related, onto you unsuspectingly. Much like a ninja attack its always a surprise and sometimes its deadly.
"Son...I found these condoms"
"Woh! Ninja Disgust...how about some warning next time"
by Mermaidmagic October 15, 2011
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weird ass nigga who likes to see rud twerking but thats understandable who doesnt wanna see that
"damn why you acting like brutal ninja"
"brutal ninja has a massive cock"
by rduddy February 2, 2022
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When a guy sends a pic or video of his penis without warning. it comes out of nowhere like a ninja
I was messaging jack about the school work, then all of a sudden out of nowhere he sent ninja dick.
by humansvs aliens January 1, 2017
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When somebody as an above average or otherwise huge penis when erect but shrinks to near disappearance when flaccid, or in other words vanishes like a ninja.
Example: That mother fucker has a ninja dick.
Example 2: I got ninja dick. that shit maybe 1 or 2 inches long till I get a hard on but then that shit massive.
by Pickle Reeves May 4, 2023
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