granny farming
n.—Gloss: a form of voting fraud in which pre-marked absentee ballots are taken to nursing homes to be used and mailed by residents. «“Granny farming” is a term for visiting retirement homes with pre-marked absentee ballots.» —“The Buzz: Get stumped” by Kyle Odegard Gazette-Times (Corvallis, Oregon) Nov. 6, 2007. (source: Double-Tongued Dictionary)
Further reading
When someone is perseverating or worrying too much, some Spanish speakers will suggest they stop obsessing with the phrase no te comas el coco. Literally, it means “don’t eat the coconut,” the word coco in Spanish being slang for “head.” This is...
Karen from Santa Barbara, California, wonders about the verb to retire. Why doesn’t it mean to tire all over again? The Spanish word for retirement, jubilación, is cognate with the English word jubilation. This is part of a complete episode...
I recall hearing this term being used back in the late 80s in the UK – the Tories had a fondness for using the tactic in local elections.