Many good books and texts on astronomy provide a helpful glossary of technical terms for the beginning reader. Useful as such lists are, they usually list only the standard definition of each term. Here are some decidedly non-standard alternatives for some important astronomical jargon.
Red Shift - what will happen if Obama is re-elected President in 2012 (according to some Republicans)
Wormholes - used by staff of the Space Station to go home for the weekend.
LCROSS - this is NOT a new sport. Real definition: The Launch Crater Observation and Sensing Satellite.
NASA - No Aliens Seen Anywhere
Multiverse - when a group of poets speak at the same time (see two pictures below)
Contact me if you have more to share and I'll add them.