The tell-tale sign of a pedofile. A facial expression that is a fairly accurate dictation of whether or not, person in question rapes children or not. This expression is commonly a cross between a grin and a smirk. Pedosmile is a play on words, combining pedofile and smile.
Priest-with-pedosmile: Come little boys, I have cookies.. Don't you like cookies?
Boy 1: Yeah, they're great!
Boy 2: Psst, dude, don't fall for it.. He's got a pedosmile
Boy 1: Wow, good thing you can spot those guys out.. That cardinal almost had his way with me..
Boy 2: Damn right it's a good thing that I can spot 'em out..