to be very happy with ones self when other are not
I shagged your wife in the ass- check out this smug grin
by G August 07, 2003
someone who thinks theyre way better than everyone else or anything really, very pleased with themselves, radio 1 DJ's who think theyre smart.
Lisa l'Anson, what more can i say?
by haha March 07, 2005
Adjective describing a person who is overly confident in themselves. Often this confidence is completely false and the person has no real reason to be so confident in themselves. Results in great annoyance with the smug's friends, and also commonly the smug affects them, as smug originates from the nose dimple area.
Ashvin think's he's sooo cool, but he's just smug.

The smugness emitting from his nose dimples creates clouds and storms of smug around him!
by smug4lyfe23 February 17, 2007
Smog like pollution that comes from the farts of fart loving hybrid car owners. Smug from San Fransisco and Hollywood that meets with smug from Colorado can create extreme storms that kill thousands of actors and kenny.

(South Park Creation)
You shouldn't have written that gay little song that got everyone to buy hybrid cars and produce smug, now should you?
by Isar March 31, 2006
Someone who is self-important, slightly sassy, and generally very pleased with themselves.
That bat weevil was so smug.
by J Halpert. January 19, 2013
To be high on oneself. To think your better than other people.
The Everek family, does not have to buy air freshiners, for there bathroom, because they are so smug they think there shit don't stink.
by Anti smug September 15, 2013
S- Stupid
M- Male
U- Underestimating
G- Girls
"This smug thought he was slick cheating on his wife until he found his truck in the pool"
by JBaker August 28, 2013

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