galactic gash
A space-babes version of a slut, floating around the galaxy waiting to get fucked by anyone with a spaceship and a hard-on.
'I found a galactic gash near the black hole, she was wearing zero clothes and a smile.'
'He went from star to star just to bang the next galactic gash.'
'She was a galactic gash, and her spaceship was parked right outside my cock.'