ぶれない "Burenai" is a verb meaning physically "Unshakable" basically. We often use "Burenai" to express someone who carries out his or her intentions in positive. A guy is very well know as a burenai cooking guy on the biggest recipe site “cookpad” in Japan.
He uploads his"the day after pay day cooking recipe” and ”the day before pay day recipe" too. A gap between before and after is funny and his recipes are picked up often on the internet, of course nobody try his recipe though.