Controversial technique developed by UK fly fishers (shame!) who, when frozen stiff by hypothermia fishing in arctic like conditions, found out by accident that trout could hook themselves on a stationary fly. The idea is to cast out a bouyant fly with a fast sinking line, let it sink to the bottom and stand still until a trout foul hooks itself in the mouth or throat. Some Kiwi anglers have taken this practice to new depths and actually bring along a chair to sit in while they wait!
It is also called 'Glo bugging' as this was the fly pattern used when the technique was introduced to NZ. See also Booby fly.