To speak nonsense or about something one knows little about.
無駄なことを言う、または自分があまり知らないことについて話す。 (mudana koto o iu, mata wa jibun ga amari shiranai koto ni tsuite hanasu)
"He was talking through his hat about quantum physics."
"彼はでたらめを言っていた量子物理学について。" (kare wa de tarame o itte ita ryou shi butsurigaku ni tsuite)
to be successful in life or career
to make progress or advance
to be in a very dangerous or uncertain situation
to become known or revealed
to succeed in a difficult situation or competition
a sign that something bad will happen soon
