An onomatopoeic term meaning hanging loosely or acting listlessly; used as 'だらりと' to describe a limp or languid state.
彼は疲れて腕をだらりと下げていた。
He was tired and his arms hung down loosely.
帯がだらりとほどけている。
The sash was hanging loose.
週末で気が抜けて、だらりと過ごしてしまった。
I let my guard down on the weekend and spent it languidly.