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An adjective describing something that exceeds its perceived upper bounds.
"Why not just make ten the top number and make that the highest?"

"...these go up to eleven."
by rancidmonkey February 13, 2004
Taking something one past the limit.
From "This is Spinal Tap" refering to guitar amps only going up to 10.
Let's take this up to eleven!
by katie tran February 11, 2004