In Black Country Dialect (BCD) you could have "Arse ay" (arse ain't=arse isn't), but shar would be meaningless as a word I think. Maybe it could be reworked as a statement that one's anal engineering has no connection with the erstwhile Iranian throne: Arse ay Shah.
At the age of five, Skagra decided emphatically that God did not exist. This revelation tends to make most people in the universe who have it react in one of two ways - with relief or with despair. Only Skagra responded to it by thinking, 'Wait a second. That means there's a situation vacant.'