The FULL insertion of one or moretesticles 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
In Southern States a euphemism for clitoris is "the man in the boat" referring to the lone passenger in the dory shaped vulva. Many newly weds are determined to sink him. " Fatman in the Bathtub with the Blues" is a reference to an engorged clitoris in need of attention.
I met a woman in a bar Friday night who told me she had a Fatman in the Bathtub with the Blues at home. She wanted to know if I was interested in cheering him up.
"Latin was dead! It was about as useless to the common man, the majority of the populous, as the proverbial crocheted bathtub..."
“Looks like you win the crocheted bathtub.”