In Spanish slang, 'caja' is used to refer to 'laughter' or 'a funny situation'. It originates from the phrase 'me estoy riendo a carcajadas', which means 'I'm laughing out loud'. Over time, 'carcajadas' was shortened to 'caja'.
Examples
- Spanish: Eso fue una caja, no podía parar de reír.
- English: That was hilarious, I couldn't stop laughing.