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1.
Acronym for the TV show, How I Met Your Mother
Hey, did you check out last night's episode of HIMYM?
by teegee87 October 13, 2007
 
2.
(HIM-yim) A unit of time. It is the amount of time it takes to watch one episode of How I Met Your Mother. Without commercials, this is about 22 minutes.
Brittany: It took me one himym to figure out what HIMYM stood for.
by BarneyStinsonFTW October 25, 2010