The phrase "genius thing" refers to something very smart, clever, or impressive. It describes an idea, action, or accomplishment that shows exceptional intelligence or skill.
Sentences with «genius thing»
I think the most genius thing we did is that we didn't give up. (huffingtonpost.com)
The extra genius thing, for the company, is that there aren't even that many prizes available on the bonus roll. (canadianbusiness.com)