O nos! 

An expression often used before something horrible or painfull is about to happen.
Plural of Oh no! stupified and ended up being O nos!

"He's coming from behind and he forgot to lube!"
"O nos!"

O nos! by Poboom December 13, 2003

onos 

The big giant alein in natural selection it can pwn marines by eating them its pretty much unstopable if you dont have any weapon upgrades.

marine: ohhh nooos its an onos!
*onos eats marine*
marine: onos is digesting me thats so fucking gay takes forever to fucking spawn
marine 2: haha
*marine is finished digesting onos eats marine 2*
marine: haha

onos by stewfoo January 12, 2005

onos 

Onos - oh'noss - n. - A Greek concept of rational worry; represented by Homer's Odyssey in Athena, a Greek Goddess, and many Greek heroes in other traditional works, it is considered a positive attribute.
Romans considered "onos" a negative attribute, like Odysseus' intelligence, and it became transmuted into the less-positive "onus," or "burden."

Athena's onos was manifested in her fear of Poseidon's threat to Odysseus' homecoming.

onos by Misty De Meo March 20, 2004

ONOS TEH BAN 

*BAN*

*** You have been kicked from #channel (Die, lamer.)
* cannot rejoin #channel (address is banned)

*** operator sets mode: +b RandomLamer
<GerbilSoft> ONOS TEH BAN
<GerbilSoft> *BAN*

ONOS TEH BAN by zzt March 17, 2004

i onos 

a stupid way to say "i don't know" that i accidentally typed in a convo. with someone in sixth grade.

me:ey i got bitten by a spider on my ass
friend:ahhaha, how'd that happen
me:i onosss i onos!
~true story

i onos by ochiegirl owns you December 18, 2007

ONOS MY PANTS 

When Fiz goes extremely crazy in the Simon Wai's Sonic 2 Beta AIM chat, this is a phrase she oftens says.

<Fiz> ONOS MY PANTS

ONOS MY PANTS by GuessWho March 28, 2004

onos 

Same as "Oh No", but delivered in a more sarcastic, or comedic fasion.

"onos flying pies :o"

onos by omg pie May 29, 2007