phrasal to manage the sails of a ship so as to keep it clear of obstructions as it floats down with the current of a river or channel, to take opposite positions alternately ; shilly-shally
BACK AND FILL
Meaning of BACK AND FILL in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012