A very messy bun that a girl can get her hair in in about 3 seconds. Usually not very sturdy and sitting high on the head.

named for the usefulness of such a bun, but can be used to describe the look regardless of reason for it.

shortened to bj bun
- that girl's hair-do looks like it took her less than a second to put up!

- looks like a blow job bun to me!
by 30834207 May 26, 2011
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