Daisy Bell

Daisy, Daisy,
Give me your answer, do!
I'm half crazy,
All for the love of you!
It won't be a stylish marriage,
I can't afford a carriage,
But you'll look sweet on the seat
Of a bicycle built for two!

gallows humor

Definition of gallows humor
: humor that makes fun of a life-threatening, disastrous, or terrifying situation

Definition of old school tie

: an attitude of conservatism, aplomb, and upper-class solidarity associated with English public school graduates

a necktie displaying the colors of an English public school

clannishness among members of an established clique

black humor

Definition of black humor
: humor marked by the use of usually morbid, ironic, grotesquely comic episodes

been-there done-that

an exclamation expressing familiarity and boredom with a situation, experience, etc

has-been

informal : a person who is no longer popular or successful

dinosaur / dinosaurian / dinosauric

one that is impractically large, out-of-date, or obsolete
The factory is now a rusting dinosaur