is an intentionally misspelled
"Oh hi" and is usually
used as a title on cutesy pictures of animals like on lolcats
The phrase is often followed
by a short, badly spelled sentence
as if the animal
/subject in the picture is talking
to the viewer.
O Hai may also refer to these types of cutsey animal
images in general.
Picture of kitten
in a stack of business reports.
"O Hai, i am bein yur nu secritary. Get me cofy."