Comparative form of grubby: more grubby(adjective)
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Use "grubbier" in a sentence
"These "grubbier" creations have spanned over ten years worth of albums and countless compilations."
"The 'Closer' beauty thinks she has only been so successful because of her looks, but has admitted she and her actress friends are "grubbier" than most women and often look "ugly" when they wake up wearing last night's hairstyle and make-up. disgusting after showbiz parties."
"What's mostly happened since – the contemporary end of this scandal – is News International's still grubbier efforts at a cover-up."