Grubby means dirty or soiled, often through contact with dirt or grime. It can also refer to something that is shabby or worn-out looking due to neglect or age.
Usage examples
The little boy came home with grubby hands after playing in the mud.
She refused to shake his grubby hand, seeing the dirt and grease on his fingers.
The old car had a grubby interior, with stained seats and dusty dashboard.
The kitchen sink was covered in grubby dishes that needed to be washed.
He wore a grubby T-shirt and ripped jeans, making him look unkempt.
The best tablets are easy to use with vibrant big screens, but they aren't necessarily small enough for grubby little hands. (digitaltrends.com)
I have since changed dining sets and the chairs that I have now are nice and sturdy and best of all I can easily wipe them off when little grubby hands get on them. (littletechgirl.com)
Kids need to get grubby on a regular basis. (treehugger.com)