The act of running over another whilst simultaneously excreting upon them. The New York napalm can be improved if the runner has spicy faecal matter, for example having a spicy curry the night before.
"Elaine got a right good New York napalm,you can really tell she has a rash on her chest. Must have been matts vindaloo"
"Dude I know she's wearing a really low top. You can tell what's happened"
When two people, usually New Yorkers, engaged in concseual and mutual exchange of excrement between each other’s assholes. Both parties empty their bowels and then fill them up again with the other persons shit.
Johnny was excited to tell his girlfriend Jane about his ultimate sexual fantasy of performing the worlds first televised New York Poop Exchange.