/ slæg; NAmE / noun , verb
[ U ] the waste material that remains after metal has been removed from rock
[ C ] ( BrE , slang ) an offensive word for a woman, used to suggest that she has a lot of sexual partners
( -gg- )
- slag sb off
mid 16th cent.: from Middle Low German slagge , perhaps from slagen strike, with reference to fragments formed by hammering. The verb sense criticize dates from the 1970s.