When the food you're eating is greasy, nasty, and otherwise disgusting, but you could care less because it is so good.

Man, this Rally's/Checker's Big Bufford sure is dirty good.

top examples include:
Rally's/Checker's
Hardees/Carl's Jr.
anything with grease dripping off, etc...
by Clay Davis November 15, 2007
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(adj) This "double adjective" is used to describe anything that is so good, people feel like they have to clean themselves. Often used when talking about food, sex, or a set of skills.
Yo, this Disney funnel cake is dirty-good. Lemmie schedule a dentist appointment.

Man that girl was dirty-good. She lubed me up and straight helicopter'd on my wingwang.

I was bumpin' that dirty-good song 'Strobe' in my car and had to hit-up the car wash.
by kiD_nogarD February 25, 2011
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Bum fuck your mum and her dead sister while having a condom on your head then get them pregnant and kick the children into a tv then slam their head into a draw till the head cracks the fuck the brain
Me and my mum and aunt did a dirty good boy
by Justin Paul April 9, 2022
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When you shove your kfc sauce fingers in her nose then suck her tits till milk comes out then processed to bum fuck your mums dead sister from 911 then fuck your mum till she has a heart attack
Me and my girl friend did a dirty good boy last night
by Justin Paul April 9, 2022
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