Many thanks, Jon!! :D
Actually right after A says the line, "I'm little freaked out," B says to A "I don't know who that is, but is this someone you want to impress?" Then, A says "This is a genius."
As you said, I might have misheard. So I checked the video, and I could only hear it as "This is genius," but in the transcript (the movie, THE INTERN), it says "This is a genius."
So, if it's "This is genius," does it make sense in that scene? Then I guess the meaning should be the first definition that you said, but still I didn't get the point.. :'(