O.D. 

overdose; generally fatal, in so much as that one's system cannot handle the quantity of drug being pumped into it; hence death; generally a body-wide systems failure.

as drugs become the more popular venue of entertainment/escape the rate of O.D. rises in accordance.

O.D. by Ilianivich March 15, 2003

O M G 

A internet abbrieviation that has managed to break communication boundaries and is spoken by some in public.
Simply put OMG means, Oh my god!

Person 1: "Look at her outfit, can you believe someone would wear that?"

Person 2: "O M G. , have they even heard of the word fashion."

O M G by Sean Big Red July 6, 2006

O///o 

1)a face of embarrasment with a pinch ok wtf in it
2)omg
3) a way to blush *blush*
4) a way of an embarrased wow (example larry:omg wow....O///o)

bob:i was watching u in ur sleep.cute right?
annabell:O///o

O///o by kendra aka mello April 18, 2008

o rly?

What owls say when they require clarification of a previous comment.

Person: The USA should not have invaded Iraq as they only did this for the purposes of acquiring access to oil supplies. Other countries such as North Korea are far more secretive and uncontrolled as far as nuclear power are concerned, but they have no oil, so clearly their nuclear capabilities and human rights abuses are irrelevant.

Owl: o rly?

o rly? by peterigg June 3, 2006

O'Leary 

last name of somebody of irish originity

son of leary

o = son of

examples of the o'leary name ; dermot o'leary, david o'leary etc.

O'Leary by little o'leary June 2, 2009

O.I.L. 

This is what the Bush Administration first called the war in Iraq... that is until they realized what it spelled.

MR. FLEISCHER: Good afternoon. Let me give you a report on the President's day. The President this morning has spoken with three foreign leaders. He began with Prime Minister Blair, where the two discussed the ongoing aspects of Operation Iraqi liberation.

O.I.L. by Wonkajava April 25, 2004

O.V 

Term used in Memphis, TN that means over, or to retaliate.

When I find out who robbed me, its O.V!

O.V by Anonymous July 17, 2003