Be (strictly) for the birds American slang
Used to describe something frustrating, annoying, pointless or unimportant
This exercise is strictly for the birds! It is easy yet time-consuming.
I still have to do this task even though it's for the birds.
be less importance, less outstanding in comparison with something else
Used to tell someone to go away and stop bothering you
Used to refer to an annoying or obnoxious person
To attempt to do something but produce no result or effect
If you fall for someone's trick the first time then they are at fault.
Are you going to mess with me again? Fool me once, shame on you; fool me twice, shame on me.