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1.
A character from the NBC show The Office. Portrayed by John Krasinski. Based off Tim Canterbury from the original British BBC show. Hottest fictional character ever.

Jim Halpert is an intelligent but rather unmotivated character who loves playing pranks on his coworker and deskmate, Dwight Schrute.
Person 1: Who's your favorite office character?
Person 2: Definitely Jim Halpert! He's hilarious!
by Sharpie Rainbow May 14, 2008
 
2.
Acted by John Krasinski, Jim Halpert is a character on The Office based on Tim Canterbury from the original British show. Perhaps the only "normal" and rather sane and intelligent person in the office run by regional manager Michael Scott, Jim spends his time playing pranks on annoying coworker Dwight Schrute and flirting with receptionist and later saleswoman Pam Halpert (née Beesly).
On Facebook: Officism (Church of Jim Halpert)
Jim Halpert is the Quintessence of Perfection.
by crazylazymonkey June 07, 2010