A "some what" friendly greeting usually expressed in online chats especially when the intent in not exactly 100% genuine. Usually used by people when they want to make there presence known without getting to personal.
Oh look, Mary's friend Mike is online right now, and he is very influential. I might actually get something out of him later down the line so I should at least give him a greeting but I better not call him by name because I dont want to be his friend or anything. So I better just say "Hey There"
A phrase used by Shane from the popular Buzzfeed series, BUZZFEED UNSOLVED: SUPERNATURAL when he, along with Ryan was investigating Bobby Mackey's Music World, a rumored "portal to hell."
*ENTERS A HAUNTED HOUSE*
Person: Hey there, demons! It's me, ya boi.
Demon: Ight imma head out
The phrase ‘Hey there, pretty lady’ is generally used to catcall women on the street. For whatever reason, some people who say this think it is flattering or a compliment. It can be offensive so if you want to compliment a girl, maybe refrain from using this.