Top Definition

1) Can be a statement in response to surprising news, akin to "Blow me down with a feather."

2) Can be a great line as a comeback, akin to "Suck my Cock."

Has no real meaning or context.
Person 1: Homosexuality was just criminalised!
You: Well Butter my Mash!

You: Butter my Mash, bitch!

You: Well how about you just go Butter my Mash.
by cheeeeeze November 29, 2010
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