What does it mean when you walk past a guy with his friend and he just talks to...

[BabiDiva]

...you out of nowhere? A guy you barely talk to and he says that he likes your shades but there's no sun out

 

[airforcegirl]

He's probably trying to look cool in front of his friend. You know how some guys can be shady. They won't talk to you alone but when they are with friends, they feel like they need to prove themselves by showing off, doing ridiculous thing or talking to a random girl or girls.

 

[TheRapist1]

that he thinks your an easy fuck

 

[LeksiLou]

That he likes your shades?

I don't know, maybe he's just trying to make a conversation.
No need to go to YA for this one!