buttspike 

When you have an object with a point, such as the corner of a textbook, in your backpack, or something that reaches to your butt and stays there poking your butt.

1.My textbook in my backpack keeps buttspiking me.2.My textbook is being a buttspike.3.Something keeps buttspiking me!

buttspike by GRIMROCKER777 December 12, 2010

Buttspiration 

An ASSpiration for your butt. A better butt. A butts butt. A butt to end all butts

Damn my butt sucks, better find some buttspiration.

Buttspiration by ja__ February 18, 2015

Buttpuke 

diarhea varying in substance, usually containing lumps, chunks, and hot slime which burns the cornhole. Resembling vomit expulsed rectally.

I won't be in to work today, I have a case of buttpuke.

Buttpuke by Steve January 6, 2003

Buttsucker 

A person that hides inside a toilet waiting for a victim, when someone puts his/her butt on the toilet the buttsucker lunges for his/her butt and sucks all the crap out.

You can't leave the toilet seat when your buttsucked, because the power of the buttsuckers sucking is superb.

Uncomfortable... sometimes

Can also mean loser.

Rick waited inside the the Mexican restaurant's bathroom's toilet for a victim to buttsuck. Rick is a buttsucker.

Buttsucker by HEEEHAW December 8, 2012

buttskeet 

Skeet either currently or formerly residing inside the butt.

Mr.Cantwell sat down on the chair and when he got up he left a trail of buttskeet.

buttskeet by Jewbacca May 15, 2006

buttspoke

The lines on the inside of your butthole

Dude...we all have buttspokes.

buttspoke by Clara October 6, 2004

Sarissa (with butt-spike)

A "sarissa" was an 18-ft. long spear used by the Macedonian main infantry unit the "pezhetairoi." It was an advantageous weapon because most other armies at the time utilized a spear half as long as the sarissa. It was this weapon that made it possible to end the era of the Greek "hoplite" warfare. The sarissa had a single iron tip and an iron "butt-spike." The butt-spike would be jammed into the ground at an angle when defending to keep attackers at bay and to provide extra stopping power. The butt-spike also had a practical offensive purpose as well: if the sarissa broke on the battlefield, it did not just become a stick but, rather, two spears. Also, when marching, the butt-spike came in handy to finish-off downed enemies without having to turn the sarissa completely around.

"Boy I'm glad that my sarissa (with butt-spike) is longer than their hoplite spear! Otherwise I'd have had to work to keep those Greek bastards at bay!"
-Macedonian pezhetairoi quoted at the battle of Chaeronea (338 B.C.)

Sarissa (with butt-spike) by Historius Maximus October 31, 2007