The phrase “put the ass in astronaut” is often attributed to comedian Lewis Black. He used it during his stand-up comedy routines to humorously criticize the idea of space exploration and to poke fun at the absurdity of space missions. The phrase plays on the word “astronaut” by emphasizing the “ass” part, humorously making light of the serious and complicated nature of space travel.
While it is a memorable line from Black’s performances, it may not be the earliest usage, but it is widely associated with his comedic style.
I don’t think Lewis Black has ever said anything remotely funny. What a hack.