lumbernaught 

usually used on internet forums, a lumbernaught is a truly manly man: half lumberjack, half astronaught!

shit yeah, he was so amazed that i was a lumbernaught that he hired me right ON THE SPOT.

lumbernaught by Lala92 July 24, 2007

jumbernaught 

a very large and often smelly fat person who won't shut up and generally thinks very highly of themselves.

"Devin, shut UP! You're such a jumbernaught!"

jumbernaught by iamtron April 12, 2009