(Internet slang) An image of a whale that formerly accompanied certain error messages on the Twitter microblogging website.

The situation in which a person intends to foster an animal temporarily but winds up adopting the animal permanently.

plural of foster fail

(transgender) Said of a trans woman, to fail to pass as a male owing to a successful MTF transition.

(transgender) Said of a trans man, to fail to pass as a female owing to a successful female-to-male transition.

(programming) To report immediately any condition likely to cause a failure, rather than attempting to continue.

present participle of fail fast

Third-person singular simple present indicative form of fail fast

present participle of fail safe

Third-person singular simple present indicative form of fail safe