skankier

grungier

More dirty, disheveled

• sleazierMore disreputable
• seedierMore run-down or squalid
• tackierMore gaudy or sticky
• cruddierMore low-quality

greasier · grimier · dingier · scuzzier · rattier · crummier · shabbier · trashier

filthier

More covered in grime

• foulerMore offensive to senses
• muckierMore covered in filth
• sootierMore ash-covered
• grimierMore covered in dirt

slimier · oozier · scummier · muddier · stickier · crustier · moldier · mustier

shabbier

More worn and tattered

• tattierMore worn out
• shoddierOf lower quality
• dingierMore shabby or faded
• seedierMore run-down or squalid

run-down · worn-out · ramshackle · dilapidated · crumbling · decaying · rotting · moldering

grosser

More disgusting or revolting

• nastierMore unpleasant or malicious
• vilerMore morally repugnant
• foulerMore offensive to senses
• ickierMore disgust-inducing

yuckier