manstronaut 

An astronaut of the male persuasion.

"Did you know there have never been any women on the moon? I'm going to become an astronaut and go to the moon, that will be a punch in the testicles for all those manstronauts."

manstronaut by Elle The Space Explorer March 12, 2007

Masstronaut 

the total combined mass of an astronaut in any given place at any given time.

we figured the masstronaut was about 59lbs. on the moon.

Masstronaut by MurphyT569 October 22, 2008