Original definition was meant to show affection towards something or show comparison to. Now, it is a meaningless word for people, or overused on social networking sites.
Original: I like the way the car drives. (or) It looks like we will be early for the movie.
Meaningless version: So like, uh, he, like said he wants to like go with you to like the concert or something.
Click like for me because I demand it.