/yooh"hooh'/ , interj.
1. (used as an exclamation to get someone's attention, in calling to another person, or the like.)
v.i.
2. to get or attempt to get someone's attention by or as if by calling "yoo-hoo": yoo-hooing across the back fence.
[ ‡1920-25, Amer.; of expressive orig. ]