To pursue something illusory, impractical, or impossible.
cut to the chase
To get to the point; to get on with it; to state something directly.
set the Thames on fire
To achieve something amazing but to a nearly-impossible degree; to do …
camel through the eye of a needle
Hyperbole to illustrate something that is impossible to do or to make …
give chase
To begin chasing or pursuing someone or something, whether on foot or …
needle in a haystack
Something that is difficult or impossible to locate.
be out for
To seek or pursue, especially to determinedly pursue something to one' …