Answer:
on a shoestring. With very limited financial means, as in The newlyweds were living on a shoestring. The precise allusion in this term is unclear. One fanciful theory is that debtors in British prisons would lower a shoe by its laces from a window so as to collect funds from visitors or passers-by.
Explanation:
The answer is: allusion.
Allusion is a brief reference to a person, event, place or work of art. In the quote from Act 1, Scene 4 of Shakespeare's "Romeo and Juliet," Mercutio mentions Cupid humorously to make Romeo (who is depressed) have a good time at the party. In that respect, he says he suggests that Romeo finds someone and dances.
