Some of the nicknames make sense - their name sounds a little like that word and a slip of the tongue gives them a moniker for life.
But how the heck did nicknames like (RL example) Spadge happen? --Gallifreya
[AN: Dunno how it happened to your friend, but...]
The new crewmember had a special word. A word for all things. A word that could mean all things. And after a week of hearing things like:
"This is complete Spadge."
"I love this Spadge."
"Spadge to that!"
The captain snapped and shouted, "You're Spadge!"