be (strictly) for the birds
US /bi fɔr ðə bɜrdz/
UK /bi fɔr ðə bɜrdz/

1.
毫无价值, 愚蠢, 不值得考虑
to be worthless, silly, or not worth considering
:
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His advice is strictly for the birds.
他的建议完全是一派胡言。
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I think this whole plan is for the birds.
我认为整个计划都毫无意义。