Green’s Dictionary of Slang

bandalu adj.

also bandaloo, bandulu
[ety. unknown; ? link to Fr. bandeau, a headscarf, i.e. worn here as a mask]

1. (W.I.) crooked, illicit.

[WI]L.E. Adams Jam. Patois 50: A bandulu bizness is a racket, a swindle.
[UK]‘Q’ Deadmeat 33: I didn’t want no more bandalu runnings.

2. of a situation, problematic.

[UK]J.J. Connolly Viva La Madness 113: Things had gone bandaloo very quickly.