What is Bookend?
1.
Sexual act where you have two ppl penetrating one person (one anally or vaginally and then another orally) thus like bookends on a shelf.
man sally got bookended last night by these 2 guys
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2.
A vapish dolt. An unruly sort whose behavior is often associated with staring off into space for no apparent reason, comfortable watching the grass grow, spending all day in bed looking at the ceiling.
man 1: Look at that dude over there, eatin' his fingernails and starin' at the floor.
man 2: Yea man, that dude is a bookend, ain't nothin' goin' on in his life.
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