whoopee /ʍupi/exclamation 1verb 1forms 3 exclamation1 •A spontaneous expression of delight or joy.Whoopee! I won! verb1 •To behave exuberantly; to make whoopee."If the 'twenties," said the stage-hand, who was a politician, "had done a bit more thinking and a bit less whoopeeing, we mightn't be where we are today. — 1944 formswhoopeed · whoopeeing · whoopees