My Team:
Scum        

1. 浮渣,浮垢[U][S]
2. (治金)鐵渣,熔渣[U][S]
3. 渣滓,糟粕[U][S]
4. 【口】社會渣滓[M]

 




Can you see some interesting thing here?
You're able to gain the hints from the picture of position