Annoying, overly boisterous, obnoxious.
My little sister is obstreperous as all hell, especially when I have friends over.

You are so obstreperous.
by Anonymous June 24, 2003
Noisily and stubbornly defiant.
Aggressively boisterous.
His obstreperous nature made him rage against injustice incessantly.
by bongfuel August 08, 2008
Continuously arguing your point and being determined and not giving up on it.
If you continue to be so obstreperous, you will loose your arguement.
by huxonette November 13, 2007
It Is Code For Getting A Beer
I Don't Care If Your Arm Is Broken, im out of Obstreperous, Broken Arm Buddha
by Hideanseek October 19, 2006
An adjective meaning mad insane crazy. Can either be taken positively or negatively.
The most obstreperous part was when he downed 5 gallons of Vault.
by Nihilis February 05, 2007
An adjective meaning mad insane crazy. Can either be taken positively or negatively.
The most obstreperous part was when he downed 5 gallons of Vault.
by Nihilis February 05, 2007

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