X says "I like Facebook". Y likes this. Y also says "I like it too". X likes this. I mean, X likes this comment.
X may also say "I hate beggars". 12 people like this. But what the fuck do they like, actually? Beggars or hating beggars?
X likes Y's recent activity. X likes South Park. Like This Page. X and Y are now friends. Like. Comment. Add Y as Friend.
The already well-known "like" is also applied on the last line of a dialogue. This usually means "yes, you're right, no more further questions, Your Honor".
It seems it's all about fuckin' like's. By the way, do you like this article?