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"