dirtiest
adj. B1 Intermediate US //ˈdɝtiəst// UK //dˈɜːtɪəst// dirt·i·est
adj. the most dirty or unclean of all. You use this to describe something that is much more dirty than anything else.
adj. the superlative form of 'dirty', indicating the highest degree of uncleanliness or filth. Often used to describe physical objects, environments, or, in a figurative sense, information that is scandalous or offensive.
The kitchen is the dirtiest room in the house.
After the heavy rain, the playground became the dirtiest place for the children to play.
The investigative report revealed the dirtiest secrets of the corporation, leading to a complete overhaul of its leadership and public relations strategy.