Past tense of 'bean': hit someone on the head, or in baseball, thrown a beanball at a batter.
From 'bean' (noun, slang for head, from ~1910s) plus the regular past tense suffix '-ed,' creating a verb from the slang noun.
It's fascinating how 'bean' shifted from just a noun to a slang noun for 'head' to a verb meaning 'to hit.' This shows how language evolves through sports culture and street slang, sometimes faster than formal dictionaries can record.
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