slag  
 noun [ U ] uk/slæɡ/ us/slæɡ/
  (WASTE)      
  [ U ]矿渣;熔渣;炉渣 
waste material produced when coal is dug from the ground, or a substance produced by mixing chemicals with metal that has been heated until it is liquid in order to remove unwanted substances from it
 See also: slag heap 
   (WOMAN)     
  [ C ] UK slang offensive荡妇 
an insulting word for a woman who has had a lot of sexual partners
   (LIQUID)     
 [ U ] Australian English唾沫;唾液(spit的非正式说法) 
informal for  spit informal