The true meaning of attemting to instert your dick and nuts into a girl's lubed up ass and atttemting to keep them in. It is so named because it can be just as hard as keeping a dog in the tub while giving it a bath.
person 1: did you hear about Nik
person 2: no what happened
person 1: he did a dog in a bathtub to jess
person 2: hahahahahaha
person 2: no what happened
person 1: he did a dog in a bathtub to jess
person 2: hahahahahaha
by demon slayer 69 November 20, 2016
 Get the Dog In A Bathtubmug.
Get the Dog In A Bathtubmug. by Vagio January 15, 2017
 Get the Dog In A Bathtubmug.
Get the Dog In A Bathtubmug. by Five Seven February 7, 2008
 Get the Dogs in a bathtubmug.
Get the Dogs in a bathtubmug. by maD iLL soN May 20, 2003
 Get the dog in the bathtubmug.
Get the dog in the bathtubmug. Trying to put your penis and balls into a woman's vagina.  Trying to keep them in is like trying to keep a dog in a bathtub.
by Ryan the Man May 21, 2006
 Get the dog in the bathtubmug.
Get the dog in the bathtubmug. by MELVIN May 16, 2005
 Get the dog in a bathtubmug.
Get the dog in a bathtubmug. It is what happens when Number Two (or five these days) inserts his enormous steel plated testicles inside an unsuspecting minx's beeeeeeehind and shakes them vigorously. His balls give off such friction that authorities have often feared another Chernobyl type incident.
After waving to the crowd, Number two reveals his massive testicles and pops them fair into the arse of Mimi McPherson. While she smokes crack. And her crack smokes as well.
by Mongobucket May 2, 2005
 Get the dog in the bathtubmug.
Get the dog in the bathtubmug.