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1.
One day, Miley Cyrus and Justin Bieber were sitting in Justin's room and Miley sat on his Lap. Justin tried to say he got a boner but he just failed and said the word bonder. So naturally, Miley Cyrus commented on that. And here we are today. Bonder is now on wikipedia ad could soon be a word used around the world.
Bonder is a boner
by LeJiizz September 23, 2013
 
2.
An incorrect pronunciation/understanding of the word boner.
Pronounced: BONE-dur
Martin: Do you like boner?
Fritz: What the heck is a bonder?
by 9C1 June 23, 2007