A hundred and ten percent

From Fresh Dictionary

English

Noun

a hundred and ten percent alternately 110%

1. Slang in American sports meaning putting forth the extra effort needed, giving it all you've got and then some.

   "We busted our tails and won, we gave 110%".

A commonly used slang, meaning to exert more than seems possible, hence 110%, not 100%, the usual maximum amount possible.