Sexual slang for a woman, or man, who uses a blunt wooden instrument, like a butter churn handle, to pleasure him or herself in the anus or vagina. The act must occur while standing up, and involves up and down motions.
by Cute_Su January 10, 2010
With your partner laying face down and you upright. Inserting a long object to their anus and work it like your churning butter.
by Superferret January 5, 2018