“By Shakespeare” is a maromaro-word, which means “As you like it.”
It is from one of the world’s well- known Shakespearean comedies, “AS YOU LIKE IT.”
“By Shakespeare” does not mean “To be or not to be” (Hamlet, Shakespeare) in this case. 😉
The Japanese Maromaro belongs to tend to use the common expression, “It is up to you.”
Maromaro strongly encourages you to use the maromaro phrase, “By Shakespeare” instead, from now on.
ex.) “What do you fancy to eat for lunch?” “By Shakespeare!”