Dog in a Bathtub 

The FULL insertion of one or more testicles into a woman's butthole...the term was coined based of its level of difficulty in both pain and practicality, i.e. getting a dog in a bathtub. Norf

"I had some serious nerve damage after that "Dog in a Bathtub!" - Norf

Dog in a Bathtub by Thomas Funk, Jeffinsteiner Platz June 24, 2008

dog in a bathtub 

inserting testicles into a partners anus. Why? becuase it's just as hard to get a dog in a bathtub.

I gave her a dog in a bathtub and then made her lick my shitty balls.

dog in a bathtub by MELVIN May 16, 2005

dog in a bathtub 

While receiving a blow job from your female friend, you proceed to showhorn BOTH testicles, as well as your shaft, completly into her mouth!

"I was so hard that when I put the dog in a bathtub she puked on my wang"

dog in a bathtub by Brad Comer January 15, 2008

Dog In A Bath Tub 

This is a proper name for when you attempt to insert your nuts into a girl's ass. It is so named because it can be just as hard as keeping a dog in the tub while giving it a bath.

I tried like hell to pull off a Dog In A Bath Tub on Suzy, but her queaf threw my balance off.

Dog In A Bath Tub by Harry Ballsonya March 19, 2003

Dog In A Bath Tub 

It means a dog in a bath tub.

Look at that dog in a bath tub!

Dog In A Bath Tub by latiaslatios November 16, 2016

Dog In A Bath Tub 

Trying to put your penis and nut sack inside a woman/man (what ever you prefer) anus all at the same time' hens the saying as it is as hard as.

Once i pulled off the dog in the bathtub, I found it was much harder to remove them then put them in.

Dog In A Bath Tub by whizzane December 30, 2003