Definition
To speak about something without having adequate knowledge or understanding.
胡說八道
He knows nothing about this issue but is talking through his hat.
他對這個問題一無所知，卻在胡說八道。
Don't listen to what he says; he doesn't understand the situation and is just talking through his hat.
別聽他說的；他不了解情況，只是在胡說八道。
She claims she can solve the problem, but it sounds like she is talking through her hat, without a concrete plan.
她聲稱能解決這個問題，但聽起來她只是在胡說八道，沒有具體的計劃。