There's a double laned roundabout I sometimes use when going home that has the left lane split for the first couple of hundred metres before merging. Around close of business there's usually about 50 cars waiting to turn left off the roundabout and hardly anyone in the right hand lane to go right.
So I cruise into the right hand lane and slingshot around said roundabout then drive past all those queuing to go left.
Cheating? Probably. Clever, yeppers.
So both then.
I don't know if it constitutes queue jumping though.