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Whenever butter is used as lubricant. Most likely comes from the film, "Last Tango In Paris," where two characters are having anal sex, and the man uses butter as lubricant.
~Man 1~ Man, I ran out of vaseline last night, so me and Sandy just used butterlube.

~Man 2~ Is a trip to the store that hard?
by Butterlube November 04, 2007
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Apr 21 Word of the Day
I've been jabbed
by Francesco II March 20, 2021
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