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1.
Little pieces of poo, usually sounding like machine gun fire when released.
My butt bullets missed target.
by Zach Beyer February 21, 2005
 
2.
another name for a suppository.
"Because I was puking my guts out, the doctor gave phenergan butt bullets."
by Ashley Wedding September 29, 2005
 
3.
a rectal suppository that is shaped like a bullet.

Medicine in the form of a rectal suppository because the oral form may be rejected due to nausea.

Usually taken to treat nausea or vomiting.
It is always good to have some butt bullets on hand when the flu hits for treating nausea and vomiting.
by King Du$tman March 02, 2011
 
4.
A "Butt Bullet" , that would be a penis or a dildo/vibrator that goes in the butthole.
That horny bottom boy on Craigslist is begging for a Butt Bullet to make the bad go away for the evening
by LaNerd April 19, 2011