What does “de casual” mean in Spanish?

The guide is showing you a Barcelona transport ticket and says he found it “de casual” — meaning it just turned up, not something he planned to show. In Spain this little phrase means “by chance” or “as it happens”. It often sounds light and easy, the way you point at something you came across without looking for it. Hearing it tells you the speaker is relaxed and natural, not formal.

Spoken line: “Como aquí, en este billete de casual.” — “Like here, on this ticket I happened to have.” The speaker means the ticket came up by chance, as a handy example. You will hear “de casual” a lot in everyday Spain when something just happens to come up: - “Lo encontré de casual.” — “I found it by chance.” - “Salió el tema de casual.” — “The topic came up out of nowhere.” - “Me lo dijo de casual.” — “He mentioned it in passing, not planning to.” It is informal and friendly. It tells you the thing was not planned — it just appeared. You will rarely see it in formal writing, but it is common in normal speech.