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1.
When someone stalks, captures, and makes out with any type of Bicycle.
Jim: dude whats that guy doing with your bike!
Tom: oh shit, its a Cyclophiliac
by 333cellos April 04, 2010
 
2.
From cyclo- (round), and -philiac (to love), a cyclophiliac is one who loves bicycles, quite literally. There is only one known cyclophiliac (as reported by several news agencies), Robert Stewart, 51, of Ayr, Scotland, who was caught having intimate relations with a bike in 2007.
"Och aye!, You raving cyclophiliac!"
by wee Robbie Stewart November 14, 2007