Green’s Dictionary of Slang

whooper-dooper n.

[SE whoop + redup.]

(US) a wild celebration, a carouse.

[US]J. Alexander ‘Alcoholics Anonymous’ in Sat. Eve. Post Mar. 🌐 The only hangover from the wild days that plagues the A.A. is a recurrent nightmare. In the dream, he finds himself off on a rousing whooper-dooper, frantically trying to conceal his condition from the community.