Beans, beans, the magical fruit ... the more you eat, the more you ... boot a hangover -- at least that's what Bill Cosby says.
The 76-year-old TV legend was promoting a chili restaurant Thursday in Arlington, Virginia ... and our photog asked for his advice on how to cure a hangover.
Cosby had a quick, enthusiastic answer -- but his opinion is a little biased.
We hear Jell-O shots work too.
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