top shelf 

When one takes a crap in the water tank of a toilet. This is usually done as a party prank or as a method of smiting one's enemies. It's a real pain to clean out, stinks like hell, and makes the toilet flush brown for days.

That guy wouldn't give me a beer at the party at his house last night, so I gave him a top shelf.

top shelf by Durendal April 18, 2004

ass shelf 

Part of a woman's body just below the small of the back that curves out to form the top of her ass.

I ran my hand down her back and rested it upon her large ass shelf.

ass shelf by kahner April 30, 2005

Not the brightest shelf on the knife 

One who is not the prime example of human intelligence; idiot

Bob: Did you see Lisa fall down those stairs?
Dan: Yeah, she totally tied her shoes together!
Bob: Wow, She's not the brightest shelf on the knife.

Not the brightest shelf on the knife by <name>insert<name/> September 1, 2007

Taint Shelf 

The tiny, almost useless, passenger accommodation on most modern sportsbikes. Often referred to as a “pillion”, this small, hard cushion has the effect of bludgeoning the area between the passenger’s genitals and anus throughout the ride. Because of its height relative to the driver and generally awkward seating position, these seats have a reputation for deterring passengers from wanting to ride along. These seats are a characteristic of the split tail style of motorcycles, opposed to the conventional “banana” seat (single piece) design. The prevalence of this pragmatically useless design can be attributed to the greatly improved aesthetics and improved control of the motorcycle while in full tuck, as the driver can scoot back into the shelf to secure themselves from sliding further rearward.

“Dude, do you remember having to ride bitch on my Zx10r?”
“Yeah bra, my ass still huts from that retarded taint shelf…”

Taint Shelf by Thirdgengearhead May 12, 2015

cleaning the shelf under the register 

When you clean under a mans balls with your tongue.

What is that? Ohhhhh!!! When I was cleaning the shelf under the register

cleaning the shelf under the register by kayomayo July 14, 2016

Dick On The Shelf 

Dick On The Shelf or D.O.T.S refers to a strategy girls use when their relationship falls through or their routine dick appointmentgoes south on them. This commonly occurs when the guy is not hip enough to realize that he's been put on the back burner until she has use for him. Until then, he will not hear from said female because she's "busy".

Buddy 1: Weird thing just happened. This girl that I haven't heard from in weeks just waved to me on Facebook because I'm nearby.
Buddy 2: Yeah her F.W.B just ended and you're her Dick On The Shelf
Buddy 1: Dick on the shelf ?
Buddy 2: Yup, D.O.T.S homie.

Dick On The Shelf by Syrpgangwaffuldaeus August 3, 2018

Egg On a Shelf

Egg on a shelf is referring to someone looks like an egg on a shelf. Specifically Elizabeth McDermad. She is the where this saying came from as she looks like a fucking egg on a shelf.

Nevyn: Hey Elizabeth
Elizabeth: Yeah?
Nevyn: You look like a fucking egg on a shelf

Egg On a Shelf by Kalque August 20, 2020