A sexual act involving the insertion of one's testicals into the anus of a ladyfriend followed by the intense slapping of the penis upon the lower back area.
"Mate im gonna give her a right spudding"
"I gave her 2 hours of solid spuddage"
"Dude she looks like shes been spudded silly"
The act of a person using a high performance vibrator (Hitachi Magic Wand) on another persons gooch as they hold their buttocks high in the air, all while the giver of the act is using an Orgasmatron head massager on the receiver's head.
1: Did you hear about John getting a Spudding?
2: No, what is it?
1: It's when you hold your ass up, get jabbed with a viber above the balls and have some thing massaging your head.