What does "obstreperous" mean?

Search: obstreperous

Why: On Encore:

Beethoven 3:20-4:50pm - Charles Grodin, Bonnie Hunt (1992)
A family man (Charles Grodin) becomes the master of an obstreperous Saint Bernard.
Alice: Bonnie Hunt. Varnick: Dean Jones. Ryce: Nicholle Tom. (Comedy, 87 min.)

Answer:

1. Noisily and stubbornly defiant.
2. Aggressively boisterous.

Source: Answers.com

The More You Know: In the Info for Chris Farley movies, I have often seen him described as "a portly buffoon."