A group of people or a person who believes that the moon is a hologram made by the government. This term can also be used if someone just doesn't believe in the moon. Put an (s) at the end if it is plural
"That guy doesn't believe in the moon, he is a Moon Truther"
While our lifespan is the number of years we will live, our healthspan is the number of healthy years we will have and our sexspan is is the number of years we will continue to be healthy enough to continue having an active sex life.