
1) British slang for Birmingham 2) Cheap and showy 3) Showy but inferior 4) Tasteless
Found on
https://www.crosswordclues.com/clue/brummagem

1) Sham
Found on
https://www.crosswordclues.com/clue/brummagem

Brummagem (and historically also Bromichan, Bremicham and many similar variants, all essentially `Bromwich-ham`) is the local name for the city of Birmingham, England, and the dialect associated with it (see, for example, Carl Chinn).{fact|date=February 2014} It gave rise to the terms Brum (a shortened version of Brummagem) and Brummie (applied .....
Found on
http://en.wikipedia.org/wiki/Brummagem

• (a.) Counterfeit; gaudy but worthless; sham.
Found on
http://thinkexist.com/dictionary/meaning/brummagem/
Brum'ma·gem adjective [
Birmingham (formerly Bromwycham), Eng., 'the great mart and manufactory of gilt toys, cheap jewelry,' etc.] Counterfeit; gaudy but worthless; sham. [ Slang] 'These
Brummagem gentry.'
Lady D. Hardy. Found on
http://www.encyclo.co.uk/webster/B/105

Brummagem is British slang for Birmingham.
Found on
http://www.probertencyclopaedia.com/browse/ZBA.HTM

[
adj] - (British) cheap and showy
Found on
http://www.webdictionary.co.uk/definition.php?query=Brummagem
adjective cheap and showy; `a cheap Brummagem imitation`
Found on
https://www.encyclo.co.uk/local/20974

showy but inferior and worthless.
Found on
https://www.infoplease.com/dictionary/brummagem
No exact match found.