It means it's time to be quiet because daddys talkingnow. So shh.
"Hey did you see the new v-"
"Shhhhhh it's okay daddys here"
"Time for a nap"
*muffled screams*
"Shh daddys talking"
*leaves man in a closet sort thing*
"keep it classy ramsassy"
When you're playing a game and the newb pisses you off, so you're just like SHH NEWB to piss him/her off more than they piss you off...and to in general get them to STFU and take their loss!
Immortal.7up, Immortal.Freak, and Michelle were all bitching after I told them that I made up this phrase, so I said "SHH NEWB(s)" so he would get the picture
a saltyway of telling someone to be quiet. usually used if someone is being annoying. similar to saying shut up. this phrase is commonly seen on shirts.