a letter written to a husband or boyfriend of Hispanic descent to inform him their relationship is over, usually because the author has found another lover. Dear Juan Letters are often written out of an inability or unwillingness to inform the man in person.
Sonia wrote Paco a Dear Juan letter after another man was gettin some of her booty. This letter informed Paco that she was leaving him for the other man.
by Hulencia February 16, 2010