the term "for sure" was a ghetto response to a question that means yes
Hipsters have taken this term, and with irony turned the tough about-to-shank-you word into something that's insane amounts of adorable, like a puppie sleeping next to a kitten
"sexytight jean wearer: "are you still going to meet me and katy at starbucks for our poetry session?"
The same as Forsurezy, but in the plural form. Used in similar context to "for sure" or "hell yeah", when expressing acceptance or accordance with an idea or action.
Can be used in sigular as well, which adds that extrastreet-cred to make you appear more of a hipster.