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4.
Short for operations. Used when going to a party where people will be getting hammered and you have to be very low key.
Hey lets go run those keg oppos up in cedar village!
by Yeeeeeeeeeeeeeeeeee July 15, 2009
 
1.
Friend (orignally military) (From "Opposite Number")
This is a picture of me and my oppo in the desert
by baggs August 19, 2003
 
2.
from the meaning "opportunity school" - a place where spastics or underachievers are sent to get them out of the mainstream education system.
he is such an oppo - could anyone be any dumber than him?
by francescothethird November 21, 2012
 
3.
opposite lock, informally for opposite lock. A corrective step in controling over-steer in car. Act of turning the steering wheel, in the opposite direction of tail slide.
I just added a dab of oppo, while powersliding through a corner.
by BANned March 16, 2011
 
5.
In baseball,when you hit the ball to the opposite field.
Vinny Costa went oppo for that homerun.
by Vinny Costa June 23, 2007