Most moms say this as a way to get their kids to mind their Ps and Qs. But really the magic word(s) are "HEY THIS IS LIBRARY" It means "mind your Ps and Qs" or "Say please" to get children to say their manners.
Ah ah ah, you didn't say the "magic word(s)"!
People who love Sanrio so much they would probably attack you if you say anything against their god awful brand.
"I'm a S*nrio fan, so im gonna attack you because you dont like Kuromi the emo"
A word used by the selston high school lads to say samuel myers has a boner
Watch out S-13
It is a form of saying funny, It is used in groups if you use the word you will become more popular. Many popular kids use it.
Friend makes a joke
Others :
U E s (haha)