Friend (orignally military) (From "Opposite Number")

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.

Opposition research; otherwise known as digging up dirt on a political opponent.

from the meaning "opportunity school" - a place where spastics or underachievers are sent to get them out of the mainstream education system.

In baseball,when you hit the ball to the opposite field.

Short for operations. Used when going to a party where people will be getting hammered and you have to be very low key.

Over priced piece of shit.