A colloquial way to express not understanding anything about a particular subject or situation. 'Pomo' is a container or bottle, so the phrase translates literally to 'not understanding a bottle', but it is used to mean 'not understanding at all'.
Examples
- Spanish: He intentado aprender física cuántica, pero la verdad es que no entiendo un pomo.
- English: I've tried to learn quantum physics, but the truth is that I don't understand a thing.