Having the ability or tendency to look good even when covered in sweat, dirt, overly practical/
plain clothes, guts, or whatever life throws at you.
Carrying off the rough-and-tumble look, as opposed to looking like crap after doing something
strenuous or dirty.
The opposite of 'cleans up
nice'.
Most of the people on
The Walking Dead dirty up nice - they look sexy even smeared in sweat, blood, guts and dirt.
She looked gorgeous at
the prom, but I saw her after
dirt biking: unbelievably, she dirties up nice too.