Green’s Dictionary of Slang

(Aus.) obstreperous.

1932		I.L. Idriess Flynn of the Inland 293: On occasion [he] used it as a club when ‘roughies’ among the gang proved ‘obstruculous’.
1965		P. Turner Grange at High Force 71: He was an obstroculous and wicked old sin-below when all your roses is pruned.
1968		R. Lloyd et al. Born to Trouble 102: The sergeant on duty turned uppish and obstruculous, bawling and shouting.
1985		S. Kelly Long Way from Heaven 148: D’yer know, yer can be such an obstroculous bugger sometimes, Mother.