my grave dictionary's lore on bush-word banger:

banger—one who bangs;

so not a vill in Maine;

a kid who clangs,

thus prompting pain

while whipping us insane;

that youth, with rowdy gangs,

inciting Cain;

a loudly drunken thegn

with grisly fangs;

a chap who damns by dangs;

one passing noiseful train

we shan’t explain

that runs reverse the grain.