Green’s Dictionary of Slang

abstropelous adj.

[corruption of SE obstreperous]

aggressively resistant to control or restraint.

[US]N.Y. Sporting Whip 11 Feb. n.p.: What made the doctor get so abstropolous [...] and what amount did he offer to find out who whipped him?
[UK]Partridge DSUE (1984) 3/1: C18–mid-19.