What it is
Chop on the pole is a feature method. You pot a small amount of chopped worm into a hole, against brickwork, or on a silty shelf, and you fish a worm, a worm-and-maggot, or a piece of worm over it. Perch are the honest target; tench and skimmers gatecrash.
It is not a pint of chop in the first five minutes. Little pots, a strong enough elastic for a surprise, forceps for perch.