British slang. Cockney rhyming slang.
Rubble is slang for trouble or trouble making.
Rubble rhymes with trouble.
The longer version of cockney rhyming slang for trouble is
Barney Rubble (The
Flintstones)
Alternate to
rubble is Barney, to confuse outsiders
Batman:
"where did that portal send them exactly?"
John Constantine:
"To the diver, old boat. Those rubble thruppennies will be piping their eyes till
last days are
dawning"
Or in American slang: "To hell, friend. Those trouble making dickheads will be crying till the end of time"