The act of smuggling Smurfs in one's ass.
Joe and Kyle were smurf smuggling all night, they are too tired to play tag.
While spooning, the one in the front shits on the one in the back (unknowingly). When they wake up, the poo becomes crusted, enabling rusty spoonage.
"Aww man you just rusty spooned me!!!"
"Damn bro im sorry, i had no idea!"