I have always disliked how the Hearthstone community defines 'infinite'. As long as their is a time limit we cannot talk about infinite. E.g. exodia mage cannot deal infinite damage but rather between 500-600 damage (in ranked/casual at least) depending on your APM. Exodia/APM Priest can deal a shot ton of damage too but it still depends on your APM.
I know why people use the word and it's fair enough - it's just my humble opinion.