slack v Also: phr slack off: of a 'run' of fish, to diminish in number; slack out: to let go (a line).
[1938] 1988 Evening Telegram 7 June, p. 6 The run of salmon has slacked off at Bay Bulls during the past few days. 1987 FIZZARD 211 'Several steps were followed in setting the [otter] trawl [the third being when] the fifteen fathoms of warp between the trawl and the doors were "slacked out".'
