A male or female of Finnish American ethnicity that procreates like rabbits. Typical immediate families often exceed 10 children and numbers of 20+ are not unheard of. These individuals are of the apostalic lutheran faith. Lastly the grilled cheese sandwich is said to be their primary food source and they typically are found eating around picnic tables in their dining area to accommodate the large amounts of people.
Craig: "Did you see that large pack of unsupervised children back there?".

Jerry: " Oh never mind them, they are just the bun runners from down the road.". "Don't feed them though or they may multiply,".
Craig: "Ok, then lets get out of here,".
by UPGuy February 21, 2011
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Bun, as in butt cheek, used in juvenile name-calling. We used it often in elementary school in Boulder, Colorado back in the 1960s. bun
Stop bothering me, you bun-runner!
by Skyship November 24, 2019
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