blackberry swagger, n. — Green’s Dictionary of Slang

blackberry swagger n.

also blackberry swaggerer

[? the black colour of the laces + swagger, one who carries a ‘swag’ or pack]

a hawker of shoelaces, tapes and similar small items.

1859, 1860		Hotten Dict. of Modern Sl. etc.
1864, 1867, 1870		Hotten Sl. Dict.
1873		Sl. Dict.
1890–1904		Farmer & Henley Sl. and Its Analogues.
1929		Advertiser (Adelaide) 25 Oct. 32/7: The newspaper contains a mine of information for the ‘blackberry swaggerer’ (hawker) and other itinerant visitors.