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2.
To anticipate the occurrence of an unlikely event while feigning surprise by its ultimate lack of fruition.
I half expected Billy Mays to show up in my kitchen and start telling me I was doing it wrong.
by Glitch1182 January 19, 2010
 
1.
When you don't honestly believe something to be the case, but wouldn't be surprised if it turned out to be true.
My friend was so crazy, I half expected him to actually jump off the water tower into a tub of jello when the radio station offered him $10.
by David Fier May 09, 2007