Absurd or ridiculous; so foolish or pointless that it seems senseless or ludicrous.
そんなばかばかしい話を誰が信じるだろうか。
Who would believe such a ridiculous story?
会議でばかばかしい提案を受けて、みんな呆れていた。
At the meeting everyone was stunned by the absurd proposal.
彼の言い訳はばかばかしいほど単純だった。
His excuse was so foolishly simple.