Or "Oh Hi" Derived from the epic pictures of lolcats. Used when something the cat, dog, aardvark, long cat, etc. sees something surprising or interesting yet is not limited to.

a greeting or exclamation said with an exaggerated high pitch, sass, enthusiasm and emphasis on the "haaay." Often used to indicate sexiness or a vivacious attitude.

an internet meme origination in early 2011. Images began surfacing in early March.
The picture seems to be of a teenage boy of strong stature making a goofy face at the camera.
It is therefore logical to come to the conclusion that the meme is capitalizing on his physical appearance as well as the stereotype that men who work on physical appearances are oblivious to intellectual matters. It is unknown is this meme started as a personal attack or an image randomly found on the internet. However it has been rumored many submissions contain factual information on the real identity of OH HAI KID

what white 12 year olds say to eachother because they think there ghetto. but there not, they think eating chiken is ghetho.

a noun to describe a brod you'd like to say "oh hai " to; a hot babe

An average looking babe is an "oh half hai"
An unfortunate looking babe is a "oh not so hai"

The hotter the dame, the longer the Haaaaaaaai