To gradually replace, sometimes in a mischevious way. Taken from a rock climbing term where fingers are individually swapped on a hold, now applies to stopping trucks pulling out to overtake by allowing the car behind to take your position holding it in. Also, used when places on the sofa are limited.
Incidentally, the only word to have two 'u's together, and only word to rhyme with 'purple'.
The only way to keep traffic flowing is if car drivers quurple them.
I managed to quurple my way onto the sofa, through the use of a phone call made from my mobile.
You need to quurple that hold then dyno for the top.