Meaning of SWILL in English
1》 Brit. wash or rinse out (an area or container) by pouring large amounts of water over or into it.
↘cause to swirl round in a container or cavity.
2》 informal drink greedily or in large quantities.
↘accompany (food) with large quantities of drink.
1》 kitchen refuse and waste food mixed with water for feeding to pigs.
↘ informal alcohol of inferior quality.
2》 informal a large mouthful of a drink.
OE ~an , swilian (v.), of unknown origin.
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004