Top definition
An insult to tell some you don't beleive what they are saying.
In other words, the thing they are saying is so unbelievable that you tell them to spread butter on your arse.
Man 1 - Geoffry, i'm gay.
Geoffry - Oh, butter my arse
by hahaha July 22, 2003
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Aug 11 Word of the Day
A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.
"My boyfriend has a total case of brain worms. He told me the cat was bugged so the Feds could listen in on us having sex..."

or

"You totally stumbled over that entire sentence. Can't speak English all of a sudden? What, do you have brain worms?"
by _Jez_ October 03, 2009
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2
A state of unfathomability at a comment made in polite audience.
Reg Holdsworth to the Queen: "oi you stink"

Queen: "Butter my arse Reginald"
by Fazza1 October 09, 2006
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3
Term said to a man when their partner wants to engage in anal sex and needs lubrication. Taken from the infamous 'Last Tango in Paris' scene.
"I'm on the blob tonight Archibold, you'll have to butter my arse if you want any."
by The Strut October 11, 2004
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