Definition & Meaning of "swing by"in English

What does "to swing by" mean in slang?

The structure combines "swing" (to move in a curving or relaxed motion) with "by" (near or past a location), forming a phrasal verb for a brief, informal stop. It is used to describe making a quick, casual visit to a place or person, often without staying long or planning extensively. People typically say "I'll swing by after work" or "Swing by my place when you're free."