n. /hwoop"ee, woop"ee, hwooh"pee, wooh"-/ ; interj. /hwoop"ee", woop"ee", hwooh"pee", wooh"-/ , Informal.
n.
1. make whoopee , to engage in uproarious merrymaking.
interj.
2. (used as a shout of exuberant joy.)
Also, whoopie .
[ 1875-80, Amer.; WHOOP + -ee of uncert. orig.; cf. YIPPEE ]