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2.
The metric equivalent of a shit ton.
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 09, 2010
 
1.
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 16, 2005
 
3.
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 02, 2005