bookshelf 

A rediculously large rear wing on a car.

Person #1: Look at all the stickers on that bookshelf.
Person #2: Three different tire companies.

bookshelf by Rupan March 3, 2007

BookShelf 

Sexual act where someone takes it orally and anally/vaginally at the same time. When 2 people bookend someone, they are bookshelfing or have bookshelved them.

"Were gonna go bookshelf this girl!" "Oh man me and Phil Bookshelved this slut last night!" "So, when are you gonna let me and my boy bookshelf ya?" "I walked in on my mom being bookshelved by my best friend and my dad!"

BookShelf by BodyDropper August 21, 2008

Bookshelf 

Code name underaged drinkers use for getting blackout drunk in a friends room, a bookshelf may or may not fall on someone.

Bookshelf tonight in Monica's room, should we get popov or Smirnoff?

Bookshelf was intense last night, we had to stick a toothbrush down someone's throat to make her barf up the Bacardi 151.

Bookshelf by AmoneyNdaHouse March 12, 2017

Bookshelf 

Holding your female sexual pertner at their legs upside down while she is sucking your testicle

*Bro to other bro*
Last night i had a crazy bookshelf with someone 😩

Bookshelf by Chickslayer-vallah June 28, 2022

bookshelf ass 

a chicks ass that is round, ample and sticks out just the right proportionate amount on which you could literally stack books on

yo holmes, that strippers got a great bookshelf ass

bookshelf ass by ronnie_e May 14, 2009

Bookshelf Babe 

A hot/attractive women you see, that you do you want have sex with, but cannot, since you already have a girlfriend and you are not scum enough to cheat on her. She is basically like a book that you don't read, that sits on the book shelf collecting dust.

Janice worked in the office right next to me, she was so beautiful that I often daydreamed about her in the middle of work, however I already have a girlfriend and don't want to risk an office romance either, she'll always be that bookshelf babe to me.

Bookshelf Babe by StankJuice1231 September 27, 2015

Bookshelf ass titties 

A chick with ample titties that you could literally stack books on

Damn Allyse with them bookshelf ass titties

Bookshelf ass titties by Dude who knows bookshelves November 3, 2019