means A soft, sweet-tart red (or sometimes black or golden) berry made of many small juicy beads clustered around a hollow core, borne on a thorny cane.

from From earlier 'raspis berry,' though where 'raspis' itself came from is genuinely murky — it may relate to a Germanic word for the rough, rasping texture of the cane or the fruit's bumpy surface, or to an old wine called 'raspise.' The rude noise sense — blowing a 'raspberry' — comes from Cockney rhyming slang: 'raspberry tart' for 'fart,' shortened to just the fruit.