It means to greet another person. It shares a striking resemblance to the word "hello" both visually and grammatically. It is usually used in texting as a shorter way of saying "Hello" but a less chliché way of saying "Hi".
Hey, dude! (It means "Hello, my dear friend." in formal English in case you were wondering.)
Patent dialogue of all the fuckboi around the world. So beware if a guy dm you hey then that means hey a virgin fuckboi who's hungry to be used.
Random guys to cute girls: Hey you are so cute.
Hey is defined as an expression of greeting similar to "hello," or is a way to attract attention or express annoyance.
“Hey! How are you?”
“Hey! Listen to what I’m saying!”
“Hey, I’m sick of you!”