a burger acquired from an unverifiable source, such as as a late night snack following kicking out time at a nightclub. Usually sold from a mobile kitchen. Often very worthwhile - they can be tasty, filling and inexspensive, especially when sold in daylight hours on main roads to sober drivers and passengers, but when sold to drunks after midnight will probably consist of stray cats and toast. Origin - Midlands, UK.
next little chef is about ten miles up - wait - Pull over! pull over! it's the dirty burger van! We're saved!
A sexual maneuver in which you take a fresh piece of shit, either your love partners or your own, and then you splooge on it (adding the "special sauce"), then you take it and put it between your partners ass cheeks (the buns), and you got yourself a nice dirty berger.
My girlfriend was being a total twat last night, so I gave her a nice dirty burger... then I punched her in the face.