What is "making whoopee"

Usage examples of "making whoopee".

The saws are run by airmotors, making whoopee noises but with low fire danger.

Come in and have some orange juice,' I said, for it is to that muck that he confines himself whilst making whoopee.

I guessed she and Sam had been out in the woods making whoopee, before they heard the crowd.

And a solitary troepie making whoopee with Shaw's bloody daughter.