When you try to jam both of your nuts in a girl's asshole. It's supposed to be as difficult as keeping two live dogs in a bathtub together.
i got one nut in her ass, but i couldnt manage the two dogs in a bathtub.
by billy poopluvr May 4, 2004
Get the Two Dogs in a Bathtub mug.
When a guy puts both his nuts in a girls ass.
Wow, that is as difficult as getting 2 dogs in a bathtub.
by I'm Rick Burd, Bitch April 2, 2004
Get the 2 dogs in a bathtub mug.
The act of fucking a woman in the pussy with your cock while simultaneaously sticking your balls in her arse, known as "keeping the dog in the bathtub" because it is as hard to pull of successfully as keeping your dog in the the bathtub while washing it.

See also plum fuck
"Hey Jeff, I was keeping the dog in the bathtub all last night with that ho, my balls still smell"
by DeadlyDave June 5, 2006
Get the keeping the dog in the bathtub mug.
When you shove your dick, both balls, and both fists in a girl's asshole.
Oh man, I just did 5 dogs in a bathtub with Stacy's dad last night. It was cadaverific.
by Mia Butthurts February 16, 2017
Get the 5 dogs in a bathtub mug.
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.
by Slime Church February 24, 2011
Get the 3 dogs in a bathtub mug.
You're screwing a girl in the ass. You try to get your nuts up in there as well. It's about as tough as trying to get the dog into the bathtub.
If you have a tuna can, it really is impossible to get the dog into the bathtub.
by oas August 27, 2006
Get the get the dog into the bathtub mug.