1) SHUT THE F*CK UP!

2) SEE EXPLANATION #1

3) Innocent way of saying "be quiet", usually by children who have done something naughty and wish to remain it being both confidential and secret.

4) The quickest way to abort a gossiping session.
I was just about to tell Jane about Dick's infidelity when Mom glared at me and said SSSHHH!
by BUSHIDODAN June 23, 2009
Get the SSSHHH! mug.