The stage of growth in Atlantic salmon achieved after 2-3 years.

Near adulthood, but not quite there yet.

High Schoolers.
Marta is such a smolt...she's got a lot to learn.
by Martizzle May 23, 2006
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A young person or kid who is acting like a complete and utter douche bag. A play on salmon smolt which spawn and swim out to sea- a douche smolt spawns and migrates to where it can be the most douchey, around older douche bags.
That little kid is a pathetic douche smolt. Look how he migrates toward all those big groups of douche bags.
by The_JDH July 24, 2009
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