sackcloth
noun /ˈsækklɒθ/
/ˈsækklɔːθ/
(also sacking)
[uncountable]Idioms - a type of rough cloth made from jute, etc., used for making sacks
Idioms
wear, put on, etc. sackcloth and ashes
- to behave in a way that shows that you are sorry for something that you have done