chase a rainbow

chase a rainbow

To pursue some goal or accomplishment that is utterly unrealistic or unlikely to happen. I know you'd love to be an actress, but instead of chasing a rainbow for the rest of your life, why not to pick a stable career and start being an adult? It feels like the government is chasing a rainbow in its efforts to overhaul the tax legislation.

See also: chase, rainbow

Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.