Twas "smash it to the edge, sneak it down the side, and lose it off the bottom
If the QWI suspected a pilot was, let us say, be economical in his technique, we would get a phone call asking us to set him up with a 150 intercept crossing behind. That looked identical to a 180 in the B scope right up to the final turn when instead on staying on the edge it suddenly darted into the middle then disappeared.
At which stage the radio call, “you b*****d” or something similar was heard.....