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1.
the word means WHATEVER - literally. It actually transcends many cultures - the southern speaking tongue all the way to the southern california/valley girl. WHATEVER - PISHAW
Well Pishaw, I knew that.
by river boat queen January 18, 2005
 
2.
a general word or phrase, pishaw has no definition. It can be positive, negative, both, or neither. It does not fall under one category in terms of sentence parts. It is entirely without a standard meaning. It means whatever you want it to mean. It also has no set spelling (although this is the traditional one) and no set pronunciation.
1. I am filled with pishaw.
2. His hair looked very pishaw.
3. Anna and Catherine leap and pishaw over the fence.
4. Life is ever so pishaw.
by Brooke January 02, 2004