Answer: yoohoos

AnswerCrossword Clue
YOOHOOSZesty greetings
YOOHOOSAttention-getting calls
YOOHOOSInformal greetings
YOOHOOSCalls across the room
YOOHOOSCalls: Colloq.
YOOHOOSCalls for attention
YOOHOOSCasual calls