"What fun!" (4)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">what fun</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this before)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for whee that I've seen before include "Expression of delight" , "Cry from someone going downhill fast?" , "Exclamation of excitement when going fast" , "What fun" , "Exuberant cry" .)
(Other definitions for wahoo that I've seen before include "swimmer" , "Burning bush" , "Large fish related to the mackerel" , "Ornamental shrub" , "in America, yeah baby!" .)