cooee vs oh really

cooee

• Used to attract someone's attention. 

• A short distance; hailing distance. 

• A long, loud call used to attract attention when at a distance, mainly done in the Australian bush. 

• To make such a call. 

oh really

• Used other than figuratively or idiomatically: see oh, really. 

• An exclamation of surprise or amazement. 

• Said in response to an obvious statement.