Obstreperous

Obstreperous - (ŏb-strĕp'ər-əs, əb-) 1. Noisily and stubbornly defiant. 2. Aggressively boisterous.

Ovoviviparous

Ovoviviparous - [oh-voh-vahy-vip-er-uhs] producing eggs that are hatched within the body, so that the young are born alive but without placental attachment, as certain reptiles or fishes.

Obsequious

Obsequious - (ŏb-sē'kwē-əs, əb-) Full of or exhibiting servile compliance; fawning.