a dog in a bathtub 

attempting to fit both your balls and cock inside of a womans vagina. it is called this because it is harder than trying to keep a dog in a bathtub.

christina was so loose that i totally pulled a dog in a bathtub on her!

a dog in a bathtub by carrionshine211 May 22, 2008

Dirty bathtub 

when you are in the bathtub and your grandma walks in and says "can i help you?" and you say yeah grandma get my back.

I got a dirty bathtub last night.

Dirty bathtub by aphbesties May 13, 2010

3 dogs in a bathtub 

The act of inserting one's entire penis and scrotum into an anus or vagina. The difficulty of that feat is akin to getting three dogs to take a bath at once, hence the phrase 'three dogs in a bathtub.'

Fitting my whole package into Sarah was harder than putting 3 dogs in a bathtub.

Or:

Kelly was so wide open I put three dogs in the bathtub.

3 dogs in a bathtub by Slime Church March 11, 2011

dog in the bathtub 

While doing a girl in her box you insert your hairy beanbag into her turd cutter.

Man, when I was doing Suzy last night I tried to put my ballzack into her brownstar, it was like trying to keep a dog in a bathtub.

dog in the bathtub by Scud August 20, 2004

cat in the bathtub 

When a man tries to put his balls into somebody's asshole.

Example: I tried the cat in the bathtub last night. What is that? I tried to put my balls in my wife's ass. How was that? You every try putting a cat in the bathtub?

cat in the bathtub by Bathman0922 September 20, 2013

cat in a bathtub 

Ok first off, I've seen this as dog in the bathtub on this site and it is wrong. Dogs love water, cats hate water. Which is why when you are fucking a girl in the ass and manage to get your nuts up in her too it is called cat in the bathtub. Have you ever tried to keep a cat in a bathtub? It is about as tough as getting both nuts up a girls ass.

I was fucking me Julie in the ass last night and I stuffed my nuts in her ass too. Man, she thrashed around like a cat in a bathtub!

cat in a bathtub by Lebonier March 30, 2005

dog in a bathtub 

The sexual act of placing both penis and full scrotum inside the anus of your partner. Said act is aptly titled as pertaining to the complication factor of performing the act of keeping a Dog in a bathtub.

Dude, that girl is ill. She let me give her a dog in a bathtub!

dog in a bathtub by The Broiler July 16, 2008