full boat n. a full price or total amount of money; generally, all of something; as an adj., having many or elaborate features, options, or functions. Editorial Note: Often constructed as to pay full boat or with the definite article: the full boat. In yoga and exercise there is a pose also called the full boat, which is probably unrelated. Etymological Note: Perhaps influenced by a full boat ‘full house’ in poker, representing three of one kind and two of another. (source: Double-Tongued Dictionary)
Further reading
If someone urges you to spill the tea, they probably don’t want you tipping over a hot beverage. Originally, the tea here was the letter T, as in “truth.” To spill the T means to “pass along truthful information.” Plus...
The emotional appeal of handwriting and the emotional reveal of animal phrases. Should children be taught cursive writing in school, or is their time better spent studying other things? A handwritten note and a typed one may use the very same words...