The phrase "oh bella ciao" means "oh goodbye beautiful" or "oh beautiful goodbye" in Italian. It comes from the famous Italian folk song "Bella Ciao," which was originally a protest song by rice field workers and later became an anthem of the Italian resistance during World War II against fascist forces. In the context of the song, "bella ciao" is a poignant farewell, symbolizing both a literal goodbye and a metaphorical farewell to freedom or a loved one in times of struggle and resistance.