"Banh" is a phonetic spelling of a common sound uttered by Cajuns before expressing an explanation or reaction during a spoken conversation.
(Did you see those Arab-Cajuns at the crawfish boil we had? Those Arab-Cajuns were really enjoying the crawfish there.)
"Dass da LASS toime I get gas by dem Banh-rabs, dass a rip-off, yah!"
(That is the last time I purchase gasoline for my automobile from an Arab-owned gas station in southern Louisiana, their prices are a rip off!)