sack ‧ cloth /ˈsæk-klɒθ $ -klɒːθ/ BrE AmE ( also sack‧ing /ˈsækɪŋ/) noun [uncountable]
1 . rough cloth used for making sacks
2 . wear sackcloth and ashes British English to behave in a way that shows everyone you are sorry about something wrong you have done