To fail to finish, as a sporting event or a piece of media.
While I used to love them, now I keep DNFing superhero movies.
He'd DNFed and could have gone home an hour earlier, but he wanted to see me win. 2014, Phil Gaimon, Pro Cycling on $10 a Day: From Fat Kid to Euro Pro, VeloPress, →ISBN:
Others refuse to ever DNF, slowly slogging through even the worst of books. I fall somewhere in the middle. I'll DNF a book early on if I realize I'm unlikely to enjoy it. 2021 August 10, Danika Ellis, “I'm Breaking Up With 3-Star Reads”, in Book Riot, archived from the original on 16 Aug 2021:
(abbreviation, alt-of, initialism) Initialism of did not finish.