Referred to something considered worthless, stupid, no good

To be honest with you, I think that famous writer's last book is just for the birds. It was so boring and silly that I stopped reading it halfway through

Ad essere sinceri, penso che l'ultimo libro di quel famoso scrittore non valga niente. A metà ho smesso di leggerlo, tanto era noioso e insulso

Your excuse for your umpteenth delay is strictly for the birds! Frankly, I don't believe a word of it

La scusa per il tuo ennesimo ritardo è francamente ridicola! Non credo a una parola di quello che hai detto

This expression originated in 1900s as U.S. Army slang. The original phrase was “that's shit for the birds", coming from the observation that birds would often peck at horse manure to extract seeds buried in it