from the song mood by iann dior, it means: i'm talking me and my friends wear nice suits(slick back), relaxing(kick back),
drinking(gang sippin') alcohol(forties)
Only thing I need to know is if you wet enough
I'm talking slick back, kick back, gang sippin' forties
You keep playin', not another day with you shorty
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi