To speak nonsense or about something one knows little about.
Hablar tonterías o sobre algo que uno sabe poco. (hablar tonterías o sobre algo que uno sabe poco)
"He was talking through his hat about quantum physics."
"Él estaba hablando sin saber sobre la física cuántica." (él estaba hablando sin saber sobre la física cuántica)
to make a decision immediately
the complete and unvarnished truth
to give up or quit
to fight very fiercely or with great determination
a cyber attack that redirects a website’s traffic to a fraud...
to describe exactly what is causing a situation or problem