A very large quantity in an unusual number or configuration (otherwise it would be an ordinary/English buttload). Compare: metric shitload and metric fuckton, which both designate a very large, but expected, quantity.
She carried a metric buttload of coffees out of Starbucks.
by DTM :<| January 17, 2005
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Dude, there was a shit ton of people at the party last night.

Well, I was gonna say a metric buttload. I guess we're both right.
by djsyndo October 9, 2010
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Seventeen. Why? Count for yourself the next time you have a metric buttload of anything; you'll see.
We had a metric buttload of people at the party last night, yo.

Just seventeen? Kindof a lousy turnout, dontcha think?
by Mightjo July 3, 2005
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A most swag unit of measurement used by gangstas and pimps of a classier variety. Unlike its uncultured counterpart metric buttloads shitloads and fucktons are all base ten and as such far easyer to use in calculations.
On yesterday's evening I consumed a metric buttload of fine liquor. Unfortunately When I arose from my inebriated slumber, I found myself ducktaped to the underside of a freeway wearing nothing but my proud Union Jack skivvies.
by Alexiosassypants February 18, 2016
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