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
1. Soneone tends to speak in unkind and cruel way that is likely to upset or hurt someone else.
2. The fossil tooth of a shark
1. Many people doesn't want to make friends with Sue because she has a serpent's tongue.
2. A: 'My thesis will center on a serpent's tongue.' B: 'A serpent's tongue? What does it mean?' A: 'A serpent's tongue means the fossil tooth of a shark.'