Green’s Dictionary of Slang

national anthem n.

[? seen as representing ‘stars’ and ‘stripes’ (the US national anthem being ‘The Stars and Stripes’)]

(US) sauerkraut and spare-ribs.

[US]Waukesha (WI) Freeman 24 Jan. 3?/3: ‘National anthem’ – spareribs and sauerkraut.