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1.
A shit so terrible and so vile that it renders the receiving device completely unusable until somebody in facilities arrives to repair it. The GBU-28 missile was given the nickname 'Bunker Buster' because of it's similar effect on caves in Afghanistan.
James just ate four grilled-stuffed burritos from Taco Bell...watch out, he's gonna drop a bunker buster!
by aksival February 01, 2007
 
2.
Bunker Buster is where you do a girl doggy style, and then just before you cum you pull out, and force your penis into her ass and unload.

(In order for this to count, the female must be unknowingly a participant and against anal sex.)
Cornelius Wiggins used a bunker buster on his ex cause he hated that bitch.
by MongooseTsunami December 19, 2008
 
3.
Removing the penis from the anus during anal sex, and depositing a large turd into the resulting gape hole.
"Got this $2 hooker off Florida Ave, but she made pay a premium to pull a Bunker Buster"
by TeeeJaaay May 09, 2010
 
4.
when a large cock is shoved up a butthole
when a guy spends his first night in a prison he is bunkerbustered
by Cris Long April 30, 2008
 
5.
1.Penetrating a sexual partner without the removal of their underwear.
My date went well except that the slut kept complaining all through dinner about her underwear being wet. I guess that's what I get for giving her a bunker-buster in the back of the limo before reaching the restaurant.
by mrdirkmcgirk October 25, 2010
 
6.
during carpet bombing any piece of dookie that goes into the woman's genitals is a bunker buster.
When Jim was carpet bombing Carlor, he decided to suprise her with a Bunker Buster
by Glen Newhall February 07, 2007
 
7.
getting a thumb in the backdoor right at sexual climax
JT$ loves it when Justin's mom slips him a bunker buster.
by Dr. Pepper September 22, 2003