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The act of being loyal to one's significant other. No cheating involved of any sort. Complete and utter loyalty.

The word came about in the classic movie known as Super Troopers.
Friend 1: Wanna go to the bar and get some girls?
Friend 2: Ill go to the bar, but i have a girlfriend nowz
Friend 1: So you're going frohagan.
Friend 2: Full blown frohagan
by Sloh6Oh June 20, 2014
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