1
general::
1. Also, make whoopee. Celebrate noisily, as in After exams they decided to whoop it up at their apartment, or Down in the basement the residents were making whoopee. The variant may be dying out. [Slang; late 1800s] 2. Arouse enthusiasm, especially politically, as in The volunteers' job is to whoop it up for the candidate. [Slang; late 1800s]
American Heritage Idioms
2
general::
Phrase(s): whoop it up
to celebrate, especially with cheers and whoops. • It was a very noisy party. Everyone was whooping it up well past midnight. • The campaign workers whooped it up for their candidate. • I can’t get out there and whoop it up for something I don’t believe in.
McGrawhill's American Idioms And Phrasal Verbs