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pencil shreder 

when you are giveing a blow job the girl rubs your penis across he braces
ow you got a pencil shreder
pencil shreder by cardscub April 13, 2010

Full pencil sharpener

When a dog faces away from you, places its chin on the floor, stretches out its front legs and raises its tail as high as it can.
"Don't look now darling, Hector is giving it the full pencil sharpener."

pencil sharpener 

When a girl sits on a guy's penis (so that his penis is up her butthole), she starts spinning in circles while she is still on him. During this, the guy starts moaning sounds similiar to those made by an electric pencil sharpener.
Friend : Hillel, did you and Beverly do the pencil sharpener?

Hillel : Why, yes! We did do some pencil sharpening of our own. I also got the moaning sounds down perfect, Zzzrrrrrr Zrrrrrrmmm

Friend : Thats great, maybe Beverly will pencil sharpen me too!
pencil sharpener by Brian Zolo December 28, 2005

Pencil Sharpener 

Vulgar word for 'you know what'.

See Vajayjay
Boy: Can I stick my pencil in your pencil sharpener?
Girl: Are you sure it's going to fit?
Boy: You never know unless you try. *he winks* Don't worry, I'll clean up the shavings afterward
Pencil Sharpener by Geranimo October 3, 2007

Pencil Sex 

When a man ejaculates inside a bucket, pours the bucket over his head, and drags his head across a female's body as if he was a pencil and the female was a piece of paper.
Bob: Want to have pencil sex?
Michelle: k.
Bob: OKAY IM GOING TO POUR THIS BUCKET OVER MY HEAD AND WRITE ON YOU
Michelle: k.
Pencil Sex by Khagreytits September 7, 2014

Pencil Scan 

A quick scan of the floor for any loose pencils to use. Usually before a test.
Lab Partner 1: Dude, do you have a pencil?

Lab Partner 2: Nah man, do a pencil scan.

*Lab Partner 1 looks on the floor and finds a pencil, and then picks it up*
Pencil Scan by @CBroChillington August 19, 2010