Define Last Night On Earth Meaning

Last Night On Earth
The night before suicide. Only say this if you just lost a million bucks or a similar tragedy occurs.

OH NO I JUST LOST MY JOB AND I GOT DIVORCED< TONIGHT IS MY LAST NIGHT ON EARTH
By Linda
Last Night On Earth Speech
a speech to convince one to have sex using an overly exaggerated or lame excuse. in other words it's the speech that leads to apocalypse sex.
derived from the series supernatural s.6 e.10

Dean Winchester: Hmm. So, dangerous mission tomorrow. Guess it's time to eat, drink and, you know, make merry.

Jo Harvelle: Are you giving me the Last Night on Earth Speech?
By Delphine