Now the boots on the other foot.

[sonnybabble]

I know what it means but does anyone know it's origin?

[hedgehogy]

I think it is a war saying from when the uniform was stripped off a dead soldier and put on someone on the opposite side to help them escape or whatever

[Quizmonster]

The saying, of course, means that the advantage has changed sides. "Now you're not top dog and I am!"...sort of thing. Obviously, I am not saying the previous answer is wrong, but I'd imagine that it just means "Whereas you were in a position to kick me, now it's my turn to kick you!" In other words, the kicking-boot has moved from one person's foot to another.

[Quizmonster]

I should have added above that the earliest recorded use of the phrase, in the exact form 'the boot is on the other foot', appeared in the 1860s in a book entitled Women of War by F Moore.
The idea had been used earlier to suggest that someone had got the wrong end of the stick...ie misunderstood the situation...which is not quite the same thing.