Double-cupped them double D's
‘Double-cupping’ is usually a reference to the popular Houston drug codeine or ‘purple lean’. The ASAP Mob are also known for referencing this in many of their songs. Double-D’s are a very large bra cup size.
So Juice is trying to say lets get these ‘fly ass bitches’ fucked up off that lean!
Not quite double Ds, but something like this:
To help improve the meaning of these lyrics, visit "Bath Salt" by ASAP MOB (Ft. ASAP Ant, A$AP Rocky & Flatbush Zombies) Lyrics and leave a comment on the lyrics box