Similar to "Pish Posh" which could be offensive. When modified to "Pish Pash", friendly banter is intended and expected!
NB - The words "Pish Posh" draw the face into an angry expression where "Pish Pash" leaves a smile on the face of the speaker!
It's going to snow all day!
Oh Pish Pash, it'll stop soon and everything will be sunny again!
A re-definition of the word "Premises" meaning a single building.
The origin of the new word is almost certainly the Essex & Thames Police (UK)to define a "Single Building" instead of a "Group of Buildings".
It should be noted that "Premises" is the Legal Definition of Single or Multiple Buildings since well before the year 1730.
Tonight was carry out a raid on this premis.
We found a significant amount of stolen goods in this premis tonight.