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1.
A wildly attractive man with rugged looks of the sort that earn men roles in cigarette adverts.
"Oh he's such a Jeblet"
"He's not fit, he's a Jeblet"
by Baldwinator January 10, 2012
 
2.
derog. Word used to describe an opponent in a game whom you have dismissed as no competition, who later ends up winning or coming close to winning.

See also: Jeb, Jeb-end, Jebster
*hare sees tortoise ahead of him after his nap*
Hare: Oh, you little jeblet!
by leimagnus September 26, 2013