Adjective; Describes the letter a female member of the military who is deployed to a war writes to her husband/ boyfriend at home to inform him that the relationship is over; connotation: she met someone else while she is fighting a war. Usually, Dear Francis letters admit some sort of infidelity with another serviceman.
Derives its name from the opening of the original letter.
Antonym: Dear John
I got a Dear Francis letter the other day from Afghanistan, and we're getting a divorce.