Its the one with a picture of a pointing finger, but yea it underneath the sharpen (triangle) and blur (water drop) on the tool palette
um... my tools rectangular marquee toolmove toolpolygonal lasso tool magic wand toolcrop toolslice toolhealing brushbrushpattern stampart history brush background earaser toolgradient toolblur toolsponge tool path seletion toolhorizontal type toolpen tool polygon tool notes tool eyedropper tool hand toolzoom tool
Hold down the cursor on the blur tool, then two more with pop out of the tool button and click the one that say smudge.