Top Definition
placing the thought of cumming inside someones head, and making them cum randomly all of a sudden.
I was walking down the street and someone inception cummed me and I had to run home because I came in my pants.
by bevll December 11, 2010
secretly planting cum on someone without them knowing
look at that chicks skirt i just inception cummed on her.
by bevll December 11, 2010

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