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1.
LON
Abreviation for Loser On Net
Wanna hang out? Or are you gonna be a LON?
by allan January 22, 2004
 
2.
Lon
Short for "pylon"...where a pylon is a person who just stands around silent and stationary, like an actual pylon.

Can also refer to someone uninteresting or boring.
Some party that was...everyone was just standing around like lons so I left...
by PYLON JOHNSON December 05, 2013
 
3.
lon
A superlative suffix of an adverb, meaning "very".
Q: Do you want to get drunk tonight?
A: Totallon!

Q: He's hot. Is he gay?

A: Obviouslon.
by Grubtard December 04, 2009
 
4.
lon
A way to pronounce the natural log which is actually spelled Ln.
The integral of 1/x is "Lon" of x. (Ln x)
by Zip Code Ness March 05, 2008
 
5.
LON
Laughing Out No
Guy #1: yo im so gay ass cheeks ahha
Guy #2: LON
by come here little boy January 28, 2003