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A guy who is generally afraid to talk to girls or doesnt know how to; he needs the use of an excellent wing man to be able to chat up girls.

He thinks he is good at stuff he really isnt and doesnt push himself to try harder at stuff that he is.
Can be used as an objective noun (see example 3)
Wow that guy is so shy, he must be a Jagvir.
That guy just tried to hit on me and failed, his name must be Jagvir.
Man that Jagvir should stop playing basketball and focus more on his Chemistry marks.
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