Definition from Wiktionary, the free dictionary
Corruption of obstreperous.
- (obsolete slang) obstreperous
1748, Samuel Richardson, Clarissa Harlowe, volume IX:
- And you know, Jack (as we told him, moreover), that it was a shame to manhood, for a man, who had served twenty and twenty women as bad or worse, let him have served Miss Harlowe never so bad, should give himself such obstropulous airs, because she would die […]