A photo that's going down very well on Facebook

[andrewducker]

Or, at least, a bunch of people have already shared it from me:

Comments

[andrewducker]

I'd say that was the opposite of "we".

"Either we did it, or they did"
"Either I win the prize, or you do."

But I agree that English doesn't have precise opposites, so if it doesn't feel right for you, then it just doesn't :->

[pseudomonas]

It isn't a matter of English not having precise opposites, just of personal pronouns not having them. I'm reminded of the Just William crossword in which "CAT" is clued as "Opposite of dog".