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1. Waiter's Crack
A severe chaffing or irritation of the anal area due to a combination anal hair, moist conditions and quick movement. usually occurs during busy or extended sessions of waiting tables. Usually causes great discomfort and can affect an individual's walk while symptom's are persist. Generally affects men. Also known as waiter's butt or waiter's ass
I think Steve has waiter's crack, look at the way he is walking.
2. cobweb crack
oh where to begin...picture this: a hot, humid day...you're workin up a nice, sticky sweat for hours and hours without a break. you go to bend over or sit and ever so gently you feel this pricking tug between your swampy moist butt cheeks. you wonder what could it be? a tick? a mosquito? but deep down you know, you know exactly what it is. when you woke at the crack of dawn and did your number in the bathroom, you wiped too hard, using too much toilet paper. This left pills in your sliver which when combined with a hot summer's day and sweat creates a cobweb crack that pulls and pinches with sudden movements. yes folks, ouch is right. but remember, now that you know you can prevent this from happening. a washcloth and water are useful tools after #2's. HELPFUL HINT: a quick swipe with your finger can snap the web...BEWARE: finger might reek of old poop and farts.i forgot to mention its the toilet paper that gets stuck to your butt hairs and pulls to create the pain.
"Ouch, man I just felt a massive prick." "Who you callin prick, Johnny?" "No man, in my butt crack." "Oh come on, not a again, you got cobweb crack again today?" "My alarm clock didn't go off again and you're always early" "I guess you better do the manual snap" "Just don't complain when you get a wiff at lunch when I'm sharin my chips with ya."
3. swamp crack
The condition of your ass crack when you haven't wiped completely and your behind is moist, causing itching or rash.
Person #1: "My ass crack is moist and itchy."
Person #2: "Sounds like a case of swamp crack."
4. Moist Michael
A prank pulled on a person by placing ones finger into a sweaty butt crack and then placing said finger in an unsuspecting person's ear with a twisting motion while saying 'Moist Michael!' Similar to a wet willie.

The female version is called a Moist Michelle.
I just got Ben back for drawing on me with a Sharpie at the party the other night by giving him a 'Moist Michael'
5. Moist Michelle
A prank pulled on a person by placing ones finger into a sweaty or moist vagina and then placing said finger in an unsuspecting person's ear with a twisting motion while saying 'Moist Michelle! Female version of a Moist Michael.
That chick was puttin the moves on my man, so I gave her a Moist Michelle
6. Moily
A combination of moistness and oilyness originating from the crack of the ass.

1. Gosh Diana! My ass-crack sure is moily after that fart I just let!

2. After Diana slid her hand down Dave's pants and along his greasy butt-crack, her hand was all "moily".
7. gack in the crack
The substance in between a man's ass cheeks that creates skid marks. Also known as butt butter, gack in the crack is usually formed as a result of several components put together. These are:
1) A hairy ass
2) A moist defecation followed by clean up with cheap TP
3) Physical exertion that causes the hairy ass to perspire
Mike took a hurried dump in the portajohn outside the stadium and then went back to tailgating. It was a long walk back to the pickup and the hot weather made him sweat. By the time he got back to the beer cooler he had some gack in the crack.
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