Top Definition
its where you have a hole in the front of your pants and the girl you are with has a hole in the back of her pants, as she sits down on your lap your junk goes straight up her ass!
The girl that was just sittin on my lap got a Napolian insertion.
#napolian #insertian #napolian obsertian #alaskan pipeline #japolian kinergin
by a wee little boy March 23, 2010
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