The acronym DAMF actually has a variety of meanings, and since I cannot think of any examples, I will just list them in that section.
Person A: DAMF obviously stands for Dumb-Ass Mother-Fucker.
Person B: No, it stands for Dope-Ass Mother-Fucker!
Person C: What about Dead-Ass Mother-Fucker?
Persons A & B: Yeah, what about Dead-Ass Mother-Fucker? D'you wanna be one?
Damfino is the name of Buster Keaton's boat in his hilarious 1921 short film... The Boat. In modern terms, hardcore fans of Buster Keaton refer to themselves as "Damfinos".
"At the end of the movie, The Damfino was a wreck."
"She's a real Damfino, she's seen 'Sherlock Jr.' 500 times!"