Ass Diamonds 

During the act of anal sex the compressing of the penis against feces occurs. The excrement then becomes compacted into a hardened "Ass Diamond".

Yesterday morning Latoya shit an "Ass Diamond" that ripped her ass apart.

My friend Jake has been making "Ass Diamonds" all morning because of his late night over at the frat house.

Ass Diamonds by The Ass Burglar October 12, 2012

Ass Diamond 

A shit so hard, that it tears the ass on the way out, leaveing his/her under-garments stained red.

Holy shit paste! I just pushed out the hugest Ass Diamond. Ohh god....

Ass Diamond by DrMcRofl February 22, 2011

Diamond Ass 

An ass that’s so tight if you stuck a piece of coal up there you’d have a diamond in a week.

May reference just an incredible, tight, sweet ass. Or, may reference someone that is an uptight fucker.

Rachel got a diamond ass. It was so tight I barely got in.

Doug is a diamond ass.

Diamond Ass by Eaton Holgoode June 9, 2018

diamond in a goat's ass 

Someplace or something very beautiful hidden or masked by something ugly.

Their studio was in the middle of a run-down warehouse but when you got inside it just opened up into this amazing space... it's like a diamond in a goat's ass.

diamond in a goat's ass by Original Artfag May 3, 2015

Shines like a diamond in a goat's ass 

To say: "Shines like a diamond in a goat's ass" is to provide high praise for something or someone. A harsh term, it is often used by men in the working trades. A star baseball player on a mediocre team could be said to "shine like a diamond in a goat's ass." Often, the phrase is used as a compliment for a really nice car or motorcycle. Ironically, it would not be appropriate to compliment a diamond ring or other jewelry with this phrase. (Body piercings excepted.)

1. That new chrome on your Harley-Davidson shines like a diamond in a goat's ass!
2. The ghost flames on your pickup truck make it shine like a diamond in a goat's ass.
3. Inappropriate usage: "Your engagement ring shines like a diamond in a goat's ass!" (That might get you bitch-slapped.)

Shines like a diamond in a goat's ass by rook's Buddy May 23, 2010

Diamond in a Donkey's Ass 

Meaning something very pretty and rare surrounded by something horrible and ugly.

A very classy and beautiful woman spending the night in a roach motel would say, "I'm not staying here, I would feel like a Diamond in a Donkey's Ass"

Diamond in a Donkey's Ass by gwennie68 July 1, 2011

diamond in a billie goats ass 

something that is very shiny or that sticks out , obvious

More shiney than a Diamond in a Billie Goats Ass.. Like nice wheels on a crappy old car.

diamond in a billie goats ass by Bob Ce February 25, 2007