Looking on the internet deeply has found these results:

hihi is the most popular phrase on the web.

Hi hi 11,290,000 results on the web	hihi 142,800,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
Hi Hi, I'm just stopping by. His investment was a scam. His his his kitchen window's right across from my bedroom. Hi hi, have a seat. His Hi Hi, I'm just stopping by.	It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

Hi hi

11,290,000 results on the web

hihi

142,800,000 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.