1) While doing a female doggy style, the male withdraws his penis from the female’s vagina prior to ejaculation during intercourse (coitus interruptus), at which this time, the semen ejaculated onto the female’s back is then being collected in the dimples of the female’s lower back.

2) While doing a girl from behind, the guy pulls out and nuts on the girl’s back. The jizz is then collected in the dimples of the girl’s lower back.

3) Indentations on a girl's lower back that can be used as thumb grips during doggy style prior to becoming filled with semen.

Synonyms: 1) Dimples of Venus; 2) Sacral dimples; 3) or simply, back dimples.
"I was at the gym (or beach) yesterday and I saw a girl with cum reservoirs on her back!"

"Ughhh... yeah, do me doggy style baby, and before you cum, I want you to pull out and fill up my cum reservoirs with your hot load!"

"Hey, wasn’t that scene in "Kick-Ass" awesome when Kick-Ass was rubbing lotion his friend’s back, and the camera panned down for a perfect close-up of her cum reservoirs?!?"
by icorruptedyou April 29, 2010
Get the Cum Reservoirs mug.
Refers to when animals, dogs and rats et cetera, fall into a reservoir and are incapable of escape.
They must therefore eat each other to survive.
A bloody mess, of course, ensues
The Battle at the Kool Moe Dee concert was like a bunch of reservoir dogs going at it.
by Ignatius Strangelove November 11, 2007
Get the reservoir dogs mug.
Quentin Tarantino's "First" film, about a botched Bank heist.
Includes the (in)famous ear torture scene.
Reservoir Dogs?
"Clowns to the left of me, Jokers to right, here I am stuck in the middle with you"
by cool_penguin_0 August 20, 2004
Get the reservoir dogs mug.
the closed end of a (male) condom; the diameter of the condom is greatly reduced for the last 1/2-to-3/4".This small chamber reduces the pressure of semen in the end of the condom, reducing the risk of the condom breaking.
She squashed the reservoir tip of the condom with her thumb and forefinger as she rolled the 'lube' onto his erect penis.
by John R. December 9, 2003
Get the reservoir tip mug.
The results of defecating in the water tank of a toilet.
"Don't tell anyone, but I totally left some nice reservoir dogs in the staff bathroom..."
by Leetamus September 3, 2009
Get the reservoir dogs mug.
1) The portion of a condom at the tip which serves as a reservoir for semen upon completion of the emission

2) A person whose body serves as a reservoir for semen upon completion of the emission
1) Be careful taking condom off, the reservoir tip is filled with spunk

2) Look at her, she has so much skanky club sex that she's pretty much a walking reservoir tip
by jj smythe October 20, 2015
Get the reservoir tip mug.